Individual variability in response to food, exercise, and other health interventions is significant; what works for one person may not work for another, necessitating personalized approaches.
2
Continuous Glucose Monitors (CGMs) are crucial for understanding individual glucose responses to specific foods and activities, revealing 'potato spikers' vs. 'grape spikers' and identifying undiagnosed pre-diabetics/diabetics.
3
Beyond general Type 1 and Type 2 diabetes, there are distinct 'sub-phenotypes' like muscle insulin resistance, beta-cell defects, and incretin defects, which dictate optimal lifestyle interventions and drug responses.
4
Wearable sensors and 'microsampling' (e.g., Iollo) allow for deep, real-time health monitoring, enabling the identification of individual 'ageotypes' (aging patterns) and providing actionable, personalized recommendations to improve health markers.
Protocols
Concrete recipes — what, when, how much, and why
7 items
Post-Meal Brisk Walk
WhatTake a brisk walk after eating a meal.
When15-20 minutes after a meal.
Dose15-20 minutes.
For whomAnyone, especially those who experience post-meal sleepiness or high glucose spikes.
WhyHelps suppress glucose spikes by utilizing muscle contractions to scavenge glucose from the bloodstream.
Dr. Snyder explains that brisk walks after meals are a recommended strategy by personalized glucose management companies like January AI. He notes that while most people spike to high glycemic index foods like white rice, a 20-minute brisk walk can significantly blunt this spike. He attributes this to the low-level muscle contractions during walking, which effectively burn off glucose. He also mentions a study on 'soleus pushups' (seated calf raises) which showed that even this small muscle can act as a significant glucose sponge, further supporting the idea that muscle activity helps manage blood glucose.
Mechanism
The physical activity of walking causes muscle contractions, which act as a 'glucose scavenger,' pulling glucose out of the bloodstream and reducing the magnitude and duration of post-meal glucose excursions. This is a direct way to burn off excess glucose.
There are studies from other people on that, that a brisk walk for 15 minutes or 20 minutes after you eat will help suppress those glucose spikes.
Also said
“And is that simply due to the low-level muscle contractions associated with walking, or just pulling, they're just acting as a glucose scavenger? - That's what I assumed, yes, that you're burning it off.”— Clarifies the proposed mechanism of action.
“And you can see it personally. And so one thing, we've done, for example, most people spike to white rice, believe it or not, it's high glycemic index, but glycemic is more personal than people give credit for. Anyway, you will spike your glucose, but if you take a brisk 20-minute walk, you can just see that spike is much, much less.”— Provides a concrete example of the effectiveness of this protocol.
Exercise Snacks
WhatIncorporate short bursts of physical activity throughout the day, especially if you sit for long periods.
WhenPeriodically throughout the day, particularly during breaks from sitting.
DoseShort bursts (e.g., air squats, pacing).
For whomIndividuals who sit for extended periods, seeking to improve general health and metabolic function.
WhyCounteracts the negative effects of prolonged sitting and contributes to overall health and glucose regulation.
Dr. Snyder discusses 'exercise snacks' as a way to combat the sedentary nature of modern life. He mentions that while walking is better than nothing, activities like air squats or even 'soleus pushups' (seated calf raises) can be more effective. He emphasizes that humans are not evolutionarily designed for prolonged sitting and that any movement throughout the day is beneficial. His lab is even running a study to assess the impact of such 'exercise snacks' on VO2 max and overall health measurements. The underlying principle is that consistent, low-level muscle activity helps manage glucose and provides systemic health benefits beyond just calorie burning.
Mechanism
Similar to post-meal walks, these short bouts of muscle activity help to utilize glucose and improve metabolic flexibility. They also contribute to the broader benefits of exercise, such as the production of 'exerkines' which have systemic health advantages.
You know what I do, and there are others who do this too, you've heard of this phrase, exercise snacks, especially for people who sit all day, the idea of getting up used to be, well, get up and walk, some brief walk. But now, there are some ideas, well, maybe get up and do more than walk.
Also said
“Yeah, exactly. So we have people doing some squats. - Mm-hmm. - Now, we're running a study like that, and see what it does to their VO2 max and overall health measurements.”— Highlights ongoing research into the benefits of exercise snacks.
“I think we underestimate the extent to which our evolutionary history drove a lot more movement every day than we currently measure.”— Provides an evolutionary rationale for incorporating more movement.
Resistance Training for Muscle Insulin Resistance
WhatEngage in resistance training, particularly in the morning.
WhenMorning, especially if muscle insulin resistant.
DoseDaily, alternating between light days (more reps) and heavier days (strength focus), plus specialty days for core work.
For whomIndividuals with muscle insulin resistance; generally beneficial for maintaining muscle mass and overall health.
WhyBuilds muscle mass, which helps reduce muscle insulin resistance and improves glucose regulation.
CaveatsDr. Snyder's personal experience as a beta-cell defect diabetic showed resistance training did not improve his glucose control, indicating the importance of knowing one's specific sub-phenotype.
Dr. Snyder discusses the importance of resistance training, especially for those with muscle insulin resistance. His lab's studies suggest that if you are muscle insulin resistant, exercising in the morning can lead to better glucose levels the next day. He personally resistance trains daily, alternating between light and heavy days, and includes specialty days for core work, to maintain muscle mass. He clarifies that while his own beta-cell defect meant resistance training didn't directly improve his insulin release, it is generally believed to help reduce muscle insulin resistance. This underscores the personalized nature of exercise benefits based on one's specific glucose dysregulation sub-phenotype.
Mechanism
Muscle is a major consumer of glucose. Building and maintaining muscle mass increases the body's capacity to take up glucose from the bloodstream, thereby improving insulin sensitivity in muscle tissue and overall glucose control.
Personal experience
I gained 10 pounds of muscle mass, had no effect on my glucose control. And the reason for that, was that I'm not muscle insulin resistant, I'm a beta cell defect.
But we do think you get better glucose benefits if you are muscle insulin resistant doing in the morning. And I also do believe that, yeah, building your muscle mass will help with actually reducing muscle insulin resistance.
Also said
“I do it every day. So, but I have light days because, you know, you can't strain yourself hard every day or that's a problem. So, I have light days with more reps, and then heavier days for more of the strength stuff. And then I have a specialty day where I do, like, snatches and things to build my core, this sort of thing.”— Details Dr. Snyder's personal resistance training regimen.
“If you're muscle insulin resistant, you actually get better benefit by exercising in the morning for glucose the next day.”— Specifies the optimal timing for exercise for a particular sub-phenotype.
Time-Restricted Feeding (Early Eating Window)
WhatConsume your largest meal earlier in the day.
WhenMorning, with the biggest meal as breakfast or lunch.
For whomAnyone looking to improve glucose control.
WhyAssociated with lower overall glucose levels compared to consuming the largest meal later in the day.
CaveatsSocially awkward for many who prefer dinner as their main meal.
Dr. Snyder's lab studies, which tracked individuals with CGMs, smartwatches, and detailed food/exercise logging, found that people who ate their biggest meal first thing in the morning generally had lower glucose levels. Conversely, those who consumed their largest meal (dinner) later in the day tended to have higher glucose. This finding supports the concept that meal timing, specifically front-loading caloric intake, can positively impact glucose control, independent of total calories or weight loss.
Mechanism
While not explicitly detailed, the implication is that the body's metabolic machinery is more efficient at processing glucose earlier in the day, leading to better overall glucose regulation when larger meals are consumed then.
And what we found is that, first of all, some simple things already known is that, if you have your bigger meal first thing in the morning, you generally have lower glucose and not later at night.
Also said
“So people had their biggest meal, their biggest energy consumption later in the day, it was dinner, which was awkward socially, because that's when most of us have our big meal, or many of us do. Those folks will have a higher glucose...”— Contrasts the effects of late, large meals on glucose.
Consistent Sleep Schedule
WhatGo to bed at roughly the same time every night.
WhenEvery night.
For whomAnyone, especially those seeking to improve metabolic health.
WhyCorrelates with lower glucose levels and improved metabolic regulation.
CaveatsChallenging for individuals with frequent travel or variable schedules.
Dr. Snyder's studies have shown a correlation between consistent sleep timing and lower glucose levels. He notes that going to bed with a high glucose spike (e.g., after a late, large meal) generally correlates with poorer sleep. He also mentions the complex metabolic activity that occurs during sleep, where the brain and body transition through various forms of metabolism. While the exact mechanisms are still being explored, the consistency in sleep schedule is thought to help 'tune up' these metabolic processes. He personally tries to maintain constant sleep hours when not traveling.
Mechanism
Consistent sleep timing likely supports the body's circadian rhythms, which in turn regulate metabolic processes. Disruptions to this rhythm can impair glucose metabolism. Sleep is also a period of significant metabolic tuning and 'rinsing out' of the system.
And as I'm sure you know, going to bed, we'd found that in some of our studies as well, going to bed the exact same time, those folks have lower glucose than those who have highly variable sleep timing.
Also said
“I think we forget sometimes the number of interesting things that happen in sleep and one of the most interesting papers, to me anyway, in the last few years was a paper that I saw where they essentially had people breathe into a tube while they were sleeping. ... And it seems like sleep is this, we don't know if it's like a test run or if it's a reboot or we don't know what to call it, right? But it's just very clear that during sleep there's a lot of metabolism happening.”— Highlights the active metabolic role of sleep.
Targeted Fiber Supplementation
WhatExperiment with different types of fiber supplements (e.g., arabinoxylan, inulin) to identify which ones positively impact your specific health markers.
WhenDaily, as a supplement to diet.
DoseStart with 10g/day, increasing to 20g, then 30g/day over weeks, with washout periods between different fiber types.
For whomIndividuals seeking to improve cholesterol, manage inflammation, or optimize gut health, especially if general fiber intake isn't yielding desired results.
WhyDifferent fibers have personalized effects on cholesterol, inflammation, and the gut microbiome. Identifying effective fibers can lead to targeted health improvements.
CaveatsEffects are highly personalized; what works for one may not work for another. It's an experimental approach requiring self-monitoring (e.g., CGMs, blood tests).
Dr. Snyder's lab conducted a crossover study with arabinoxylan (found in Metamucil) and inulin, showing that while arabinoxylan generally reduced cholesterol, some individuals responded better to inulin, and some didn't respond to either. He suggests that the individual's microbiome composition, with its unique set of hydrolases, determines how effectively different fibers are processed. He proposes an experiment: maintain current diet and exercise, then add a specific fiber supplement (e.g., Metamucil for arabinoxylan), monitor blood metrics (LDL, ApoB, glucose with CGM), then wash out and try another fiber (e.g., inulin). This personalized approach aims to find the 'right' fiber for an individual's unique biology.
Mechanism
Fibers interact with the gut microbiome, which possesses diverse enzymes (hydrolases) to break them down. The specific composition of an individual's microbiome dictates how different fibers are processed and, consequently, their impact on systemic markers like cholesterol and inflammation. Some fibers also contain beneficial compounds like polyphenols (e.g., arabinoxylan).
But if you could figure out which fibers might be inducing that specifically, maybe you can avoid those foods with those fibers. - Yeah. - I don't know. And again, fiber seems to be very personalized. So, I think it is something you can try. It's a pretty easy experiment to do.
Also said
“I imagine the microbes you have in you, they have certain hydrolases that break down these fibers. And everybody's microbiome is very, very different. So, we have communities of microbes and every person's community is different.”— Explains the biological basis for personalized fiber responses.
“So, we just did it. We took 18 people. I know it doesn't sound like very many, but they did what's called a crossover study where they went on increasing doses, where they took either 10 grams a day, for the first week as a supplement, 20 the next week, 30 the next week, and then did a washout and then switched to the other one.”— Describes the experimental design for testing individual fiber responses.
Deliberate Exhale (Vagal Activation)
WhatPeriodically throughout the day, perform a deliberate, until-lungs-empty exhale.
WhenPeriodically throughout the day, as a brief 'snack'.
DoseOne long, complete exhale.
For whomAnyone looking to manage stress, improve HRV, or enhance calmness.
WhyActivates the vagal pathway to the sinoatrial node, slowing heart rate and potentially improving Heart Rate Variability (HRV).
Dr. Huberman suggests this simple practice as a way to improve HRV and promote calmness, based on its known effect on vagal nerve activation. He notes that it doesn't require dedicated time for breathwork but can be interspersed throughout the day. Dr. Snyder, who is working on improving his sleep and HRV, expresses interest in trying this technique.
Mechanism
A long, complete exhale stimulates the vagus nerve, which in turn influences the sinoatrial node of the heart, leading to a reduction in heart rate. This vagal activation is a key component of the parasympathetic nervous system, promoting relaxation and improving HRV.
Periodically throughout the day, just do a deliberate, until lung's empty, exhale, which activates the vagal pathway to the sinoatrial node, slows your heart rate down. There's evidence that will improve your HRV, both in waking and sleep states.
Also said
“You just intersperse it so there's no breath work. - Right. - You don't have to set aside time.”— Emphasizes the ease of integration into daily life.
What's new
Personal practice updates, fresh positions, predictions
7 items
Individual Variability in Metabolic Response
0:01:40
Not everyone responds the same way to the same foods, behavioral interventions, or treatments; individual variability in glucose and insulin spikes is significant and often unpredictable by general glycemic index charts.
Why this matters: This challenges the conventional 'one-size-fits-all' approach to diet and health, emphasizing the need for personalized monitoring and interventions.
Background
Traditional health advice often relies on generalized metrics like the glycemic index, which categorizes foods based on their average impact on blood sugar. However, Dr. Snyder's research reveals that these averages mask profound individual differences.
Dr. Snyder's lab published a paper demonstrating that individuals exhibit highly varied insulin responses to different carbohydrates. For example, some people are 'potato spikers' (their insulin spikes significantly after eating potatoes but not grapes), while others are 'grape spikers' (the reverse). This individual variability extends beyond just carbohydrates to other dietary components like fiber. The implication is that broad dietary recommendations, such as 'carbohydrates are good' or 'carbohydrates are bad,' are oversimplifications. The specific genes and proteins an individual expresses play a crucial role in determining their unique metabolic response, making personalized understanding essential for optimizing health and longevity.
Turns out it depends on which genes and which proteins you make. In other words, individual variability matters.
Also said
“They identified so-called 'potato spikers', they literally referred to them as potato spikers in this paper, versus grape spikers, people whose insulin spikes in response to potatoes but not grapes and vice versa.”— Illustrates the specific and surprising nature of individual food responses.
“So some people spike to bananas, some to potatoes, some to pasta, some to white bread, some to brown bread. And so, this was shown by Aaron Siegel's lab at the Weizmann, and our lab had found something similar. And it's very personal.”— Reinforces the widespread nature of personalized food responses across different common foods.
Sub-phenotypes of Glucose Dysregulation
0:20:00
Type 2 diabetes is not a monolithic condition but can be subdivided into distinct 'sub-phenotypes' such as muscle insulin resistance, beta-cell defects (impaired insulin release), and incretin defects, each requiring different management strategies.
Why this matters: This refined classification moves beyond broad diagnostic categories to enable more precise, personalized treatment and lifestyle recommendations for glucose control.
Background
Traditionally, diabetes is broadly categorized into Type 1 (insulin deficiency) and Type 2 (insulin insensitivity). Dr. Snyder's work, however, reveals that Type 2 diabetes encompasses a spectrum of underlying physiological issues.
Dr. Snyder explains that the classical Type 2 diabetes diagnosis is too broad. His research identifies distinct sub-phenotypes: muscle insulin resistance (where muscle cells don't efficiently take up glucose), beta-cell defects (where the pancreas doesn't release insulin effectively, even if it produces it), and incretin defects (issues with GLP-1 and related hormones that promote insulin release). He shares his personal experience as a Type 2 diabetic with a beta-cell defect, noting that resistance training, while generally beneficial, did not improve his glucose control because his issue was insulin release, not muscle insulin sensitivity. This understanding led him to a specific drug (repaglinide) that targets beta-cell function. This sub-phenotyping is critical because it dictates the most effective lifestyle changes (e.g., exercise timing for muscle insulin resistance) and drug therapies, moving away from a trial-and-error approach.
Personal experience
I myself am type 2 diabetic, I have a beta cell defect, took me a while to figure that out, meaning I make insulin fine, my cells respond, but I don't release it from the pancreas. So, I can gain as much muscle as I want, it's not going to help me release insulin from my pancreas.
So, knowing your subphenotype is a big deal, but then I respond to a certain drug repaglinide that actually promotes that release. So, knowing your subphenotype determines your drugs, but it also turns out this whole lifestyle thing I mentioned earlier is a big deal in coming back to some of the food stuff.
Also said
“We can say, 'This person's got mostly an incretin defect. This one's muscle resistance. This is a beta cell defect.' And some people are combinations of those.”— Highlights the complexity and potential for mixed sub-phenotypes.
“We, believe it or not, can do it just from a simple glucose curve. So, you may or not realize that when you put one of these glucose monitors on you, and you drink a shot of glucose, you'll have a curve, and that shape is different for different people, and that depends on their subphenotype.”— Explains a practical, accessible method for identifying sub-phenotypes using CGMs.
GLP-1 Agonists and Longevity
0:29:00
GLP-1 agonist drugs, known for diabetes and weight management, are now being explored as potential longevity drugs due to observed benefits beyond glucose control, including improved cognition and reduced alcohol cravings.
Why this matters: This expands the perceived utility of these drugs beyond their primary indications, suggesting broader healthspan benefits.
Background
GLP-1 agonists like Ozempic and Mounjaro were developed to manage Type 2 diabetes by increasing insulin release and reducing appetite. Their efficacy in weight loss has led to widespread use.
Dr. Snyder, a Type 2 diabetic, shares his personal experience with GLP-1 agonists, noting a significant drop in his HbA1c from 8.4 to 5.7. He also observed a dramatic reduction in fat, as evidenced by his whole-body MRIs. Beyond these effects, he mentions anecdotal reports and ongoing research suggesting GLP-1s may improve cognition and reduce alcohol cravings. He highlights that these drugs induce supraphysiological increases in GLP-1 (hundreds to thousands of times normal levels). While acknowledging the potential for side effects (like nausea, which he experienced), he notes that some individuals are microdosing compounded versions to achieve benefits with fewer adverse effects. The discussion also touches on the importance of combining these drugs with lifestyle interventions like resistance training to maintain muscle mass, as simply relying on the drug for fat loss without exercise can lead to muscle wasting.
Personal experience
I am a type 2 diabetic, and they were great for me. My hemoglobin A1C got to 8.4, which it's not the highest but it's pretty high. And I went on the GLPs and it went down to 5.7.
And now a lot of people are very interested in these GLPs as possible longevity drugs. And there are trials underway to look at this sort of stuff. So, we'll see what ways they improve people.
Also said
“I can tell you my... I mentioned I do whole body MRIs. I've done 20, as I said, over the last almost nine years. And I could just see my fat evaporated once I went on these.”— Provides personal, objective evidence of fat loss with GLP-1s.
“I've heard of a reduced craving of alcohol. What are some others that you've heard of? - Cognition is a big one...”— Lists additional, non-metabolic benefits attributed to GLP-1s.
Personalized Fiber Response
0:48:00
Fiber is not a monolithic nutrient; different types of fiber (e.g., arabinoxylan, inulin) have distinct and highly personalized effects on individuals, impacting cholesterol, inflammation, and gut microbiome differently.
Why this matters: This challenges the generalized advice to 'eat more fiber' by highlighting that the *type* of fiber matters and its effects are individual-specific.
Background
Fiber is widely recognized for its health benefits, but research by Dr. Snyder and others indicates that the effects of fiber are far more nuanced than previously understood.
Dr. Snyder emphasizes that fiber is a 'very heterogeneous' category, akin to lumping all animals together. He discusses two common fiber types: arabinoxylan (found in Metamucil and many vegetables like broccoli) and inulin (found in chicory and some fruits). His lab conducted a crossover study where individuals supplemented with increasing doses of each fiber. While arabinoxylan generally reduced cholesterol by about 25% in most participants, some individuals showed no response to arabinoxylan but a decrease in cholesterol with inulin. This suggests that an individual's unique microbiome, immune system, and other parameters dictate their response to specific fibers. The ultimate goal is to personalize fiber recommendations based on an individual's microbiome and blood markers, moving towards a future where specific fibers or even targeted probiotics are recommended to optimize health.
And so this brings us to this question of when we talk about fiber as a general category, maybe that's too broad. - It is.
Also said
“So, we have long chain, short chains, hydrophobic, hydrophilic, positive, negative. It's like saying all animals are the same. Humans are the same as cockroaches, the same as cats and dogs. - You just can't lump that broadly.”— Uses an analogy to powerfully illustrate the vast diversity and complexity of fiber types.
“But if you look at individuals, we did see some people where arabinoxylan had zero effect, meaning their cholesterol stayed flat, even when they went to the higher dose of 30 grams per day. Yet their inulin promoted their decrease in cholesterol.”— Provides concrete evidence of personalized responses to different fiber types.
Ageotypes and Actionable Biological Aging
1:10:00
Instead of a single 'biological age,' individuals exhibit distinct 'ageotypes' or aging patterns (e.g., metabolic, immune, liver, kidney, cardiovascular) that reflect which organ systems are aging faster. These ageotypes are actionable, allowing for targeted interventions.
Why this matters: This concept refines the understanding of biological aging from a single, often unchangeable number to specific, modifiable pathways, offering hope for personalized health interventions.
Background
The concept of biological age (e.g., Horvath clocks) has gained traction, but its practical utility has been limited due to a lack of actionable insights. Dr. Snyder's lab aims to provide more specific, modifiable targets.
Dr. Snyder's lab, through deep 'omics' measurements (genomics, proteomics, metabolomics) over 12+ years, discovered that people age differently at a biochemical level. Rather than a single 'biological age,' individuals have unique 'ageotypes' – specific aging patterns in different organ systems or biochemical pathways. For example, one person might have a 'cardio ageotype' with shifts in cardiovascular markers, while another has a 'metabolic ageotype.' The key is that these ageotypes provide actionable information: if someone has a metabolic ageotype, lifestyle changes like weight loss or exercise can improve their metabolic markers. He contrasts this with methylation-based 'biological clocks' (like Horvath's), which provide an overall age but no clear guidance on *what to do*. His company, Iollo, uses microsampling and AI to profile 650 metabolites, identify ageotypes, and provide specific, personalized recommendations (e.g., specific foods to eat or avoid) to improve these markers, with 95% of users showing improvement.
So we call these ageotypes, aging patterns that we see, and it turns out everybody's different. So some people will be the cardio, some people will be the metabolic, some are liver, some are kidney, based on the markers we see in the blood, and some are all of the above or parts thereof.
Also said
“What's special about the ageotypes is that they're breaking it down. And so they say, 'All right. Your immune age is off. You can do X.' 'Your other, you know, your oxidative stress is off. You do Y.' So it's basically actionable information, so I think it makes all the difference.”— Emphasizes the actionable nature of ageotypes compared to general biological age metrics.
“And I mentioned this company earlier, Iollo. What they do is they're tracking your ageotypes, because they're doing these deep metabolic profiles, and they actually make... They use AI. They pull in things and make very specific recommendations.”— Describes a commercial application that translates ageotype data into personalized advice.
Environmental Exposures and Health
1:26:00
Air quality and environmental exposures (e.g., pollen, chemicals like DEET, pesticides, microplastics) significantly impact internal health markers, inflammation, and even specific allergies, highlighting a largely unexplored area of personalized health.
Why this matters: This expands the scope of personalized health beyond diet and exercise to include detailed environmental monitoring and its correlation with internal biological responses.
Background
While general pollution is known to be harmful, the specific, personalized impact of daily environmental exposures on individual health has been less understood and measured.
Dr. Snyder carries a device that continuously monitors air quality, including PM2.5, PM10, and collects samples for later analysis of biologicals (pollen, bacteria, fungi) and chemicals. He explains that this allows for correlation between external exposures and internal health markers (e.g., blood metabolites, inflammatory markers). He shares a personal anecdote: his allergies, which he initially attributed to pine pollen, were actually correlated with eucalyptus exposure. His device also detected DEET and pesticides in various environments, even his Stanford office. The goal is to understand how these exposures relate to individual health, such as the link between outdoor microbes and internal inflammation. This research aims to provide actionable insights, like avoiding specific environments or understanding the impact of microplastics, which are increasingly found in human tissues.
Personal experience
I used to have moderate allergies. Now, they're pretty mild, because allergies can fluctuate a bit. And they would come every spring, and I just assumed it was pollen. Well, it is pollen in the end. But I assumed it was pine. But when we did the correlation, well, turns out it correlates better with eucalyptus.
I want to understand how does your environment impact your health? And it's not just air, but that's the area we decided to start in. And, you know, what are you breathing right now? You have no idea, right?
Also said
“We discover there is DEET everywhere, even in my office at Stanford.”— Highlights unexpected and widespread chemical exposures.
“We know studies from others have shown, right, pesticides correlate with Parkinson's and things like this. So, we want to see what's going on there.”— Connects environmental exposures to serious health conditions.
Impact of Immersive Psychological Events on Mental Health and Biomarkers
1:44:00
Preliminary studies using wearables, microsampling, and surveys suggest that immersive psychological events (e.g., Tony Robbins, Byron Katie seminars) can significantly improve mental health markers (anxiety, depression, burnout) and even inflammatory biomarkers.
Why this matters: This brings rigorous scientific measurement to interventions often considered 'woo,' suggesting a measurable biological and psychological impact.
Background
Mental health interventions often rely on subjective surveys. Dr. Snyder's lab sought to apply objective 'omics' and wearable data to assess the impact of immersive psychological programs.
Motivated by the lack of objective biomarkers for mental health, Dr. Snyder's lab conducted studies on participants of immersive psychological programs like those by Byron Katie and Tony Robbins. Using surveys, smartwatches, and blood microsampling, they observed significant improvements in mental health markers (anxiety, depression, burnout) in participants, which were not seen in control groups. For the Byron Katie study, preliminary 'omics' data also indicated improvements in inflammatory markers. A larger follow-up study with nearly 700 Tony Robbins participants and 700 controls showed similar significant psychological improvements. While acknowledging the non-randomized nature of the studies (participants self-selected), the consistent positive outcomes across multiple measures suggest a real and measurable effect, prompting further investigation into the underlying biological mechanisms.
And son of a gun, these people really did improve by these questionnaires, by the standards in the field. Basically, they improved their markers.
Also said
“And the Byron Katie one, we now have some of the omics data back and they do seem to improve in their inflammatory markers as well.”— Suggests a biological (anti-inflammatory) mechanism for psychological interventions.
“But the bottom line is, the ones who did do it, once again, they improved in all... Like, virtually all these things. Anxiety, depression. - Significantly. - Significantly, yeah.”— Confirms significant improvements across multiple mental health metrics in a larger study.
Recommendations
Products, supplements, and tools mentioned in the episode
3 items
Continuous Glucose Monitors (CGMs)
Tool
Essential for understanding individual glucose responses to foods and activities, revealing personalized 'spiking' patterns.
Dr. Snyder and Huberman both wear CGMs, which are now over-the-counter devices that measure glucose every five minutes. They are crucial for identifying individual variability in glucose response, such as 'potato spikers' versus 'grape spikers.' CGMs can reveal that some 'normal' individuals have glucose spikes as severe as diabetics, without their knowledge. They allow users to see in real-time how specific foods and activities impact their blood sugar, enabling personalized dietary and lifestyle adjustments. CGMs also correlate well with hemoglobin A1C, providing a dynamic, real-time measure of glucose control.
vs alternatives
Unlike periodic hemoglobin A1C measurements, CGMs provide real-time, continuous data, offering immediate feedback on dietary and lifestyle choices.
Personal experience
I'm wearing one and some of your staff I know, are wearing them as well. And they're over-the-counter now. You put these on your arm and they measure your glucose every five minutes so you can see exactly what's going on.
And I think one of the things we've done, you've heard about continuous glucose monitors, these devices, and I'm wearing one and some of your staff I know, are wearing them as well. And they're over-the-counter now. You put these on your arm and they measure your glucose every five minutes so you can see exactly what's going on.
Also said
“So, it's recommended that you try to stay in this 70 to 140 range, but it is a bit arbitrary. But it's not a bad rule of thumb to work by for the average person. But again, some people have very, very good glucose control, some are moderate spikers, and some are severe.”— Provides context for interpreting CGM data and highlights individual differences.
“what's cool about these CGMs is that you wear them, like I'm wearing one now, you can wear them for about 14 days, depends on the particular device, and you see exactly what foods do what to you.”— Emphasizes the personalized insights gained from CGMs.
Air Quality Monitor (e.g., Dr. Snyder's custom device)
Tool
A device that measures airborne particulates (PM2.5, PM10), and collects samples for later analysis of biologicals (pollen, bacteria, fungi) and chemicals (DEET, pesticides).
Dr. Snyder carries a custom air quality monitor everywhere to understand the impact of the environment on health. This device not only measures common pollutants like PM2.5 and PM10 but also actively samples the air to identify specific biological agents (like pollen, bacteria, fungi) and chemical compounds (like DEET and pesticides). The goal is to correlate these external exposures with internal health markers (e.g., blood metabolites, inflammatory markers) to understand personalized environmental impacts. He shares how this device helped him identify eucalyptus as the cause of his allergies and detected widespread DEET exposure. This tool represents a frontier in personalized health, moving towards understanding the 'exposome' and its influence on individual well-being.
vs alternatives
Most people have no objective way to measure their daily environmental exposures. This device provides detailed, actionable data beyond general air quality reports.
Personal experience
Oh, yeah. I've been doing this for eight or 10 years now. ... I used to have moderate allergies. Now, they're pretty mild, because allergies can fluctuate a bit. And they would come every spring, and I just assumed it was pollen. Well, it is pollen in the end. But I assumed it was pine. But when we did the correlation, well, turns out it correlates better with eucalyptus.
It's basically sucking up air, there's a pump in here. And underneath the intake valve, there's a filter that captures all the particulates like pollen, bacteria, fungi. And under that, there's a chemical adsorbent, it's called zeolite, captures both hydrophobic, hydrophilic, positive, negative.
Also said
“We discover there is DEET everywhere, even in my office at Stanford.”— Illustrates the device's ability to detect specific chemical exposures.
“So, we can see what microbes are outside relating to inflammation, markers like cytokines, things like that on the inside. And the same with some of the chemical markers, like your glucose levels.”— Explains the goal of correlating external exposures with internal biomarkers.
Electroacupuncture, specifically designed for blood pressure and diabetes, can significantly lower blood pressure.
Dr. Snyder, who runs slightly high blood pressure, underwent electroacupuncture treatments at an integrative health institute. He measured his blood pressure before and after his first session, finding a remarkable 25-point drop in systolic pressure (from 140s to 118) and a significant drop in diastolic pressure. He is currently halfway through an eight-week course of weekly treatments, and his blood pressure has remained consistently low. He notes that while the exact mechanisms are still being explored (referencing Harvard research on needle placements impacting inflammatory cytokines via the vagus nerve), his personal data strongly suggests its efficacy for blood pressure management.
Personal experience
I measured myself right before acupuncture, you know, very specific time of day with my monitor at home. And yeah, I was running 140 over the low 80s, something like 82, 83. Did five measurements. So, did the acupuncture, which is designed for blood pressure and diabetes... The next day, I measured it the exact same time, and son of a gun, it was 25 points lower, it was the high teens, like 118 kind of thing.
And she uses it for blood pressure, okay? For blood pressure management. So, I run a little high on the blood pressure. Not... Nobody's overly panicked. But you know, I tend to be in the high 130s, but I guess, because I was getting a very large grain out, I was in the low 140s.
Also said
“It was unbelievable. I can show you the data. And the other one went to, like 72, right? Some... The diastolic. So, I just, with one treatment... That was electroacupuncture, I should say, so they zap you.”— Provides specific, objective results from his personal experience.
A company that provides personalized glucose management, recommending actions like brisk walks after meals to suppress glucose spikes.
DisclosureDr. Snyder is involved with January AI.
January AI is one of several companies that leverage continuous glucose monitoring data to provide personalized health recommendations. Dr. Snyder mentions his involvement with the company. They specifically recommend taking a brisk walk after eating something that spikes glucose, and users can observe the blunting effect of this activity in real-time through their connected devices. This service exemplifies the application of personalized data to actionable lifestyle interventions.
I'm involved with one called 'January AI', and there's others out there, too. They actually recommend that if you eat something that spikes your glucose, you should take a brisk walk, and that will suppress your spike, and they connect to actually teach you that.
Used for early detection of health issues (tumors, cardiovascular conditions) and establishing a baseline for tracking changes over time, despite physician skepticism.
DisclosureDr. Snyder spun off a medical version of his research, Q Bio, which performs whole-body MRIs.
Dr. Snyder advocates for whole-body MRIs as a proactive health monitoring tool, contrasting with the traditional 'sick care' model. He acknowledges that many physicians are skeptical due to the potential for finding benign 'nodules' that cause patient anxiety without clear clinical significance. However, he argues that establishing a baseline is crucial: if a nodule is found, subsequent scans can determine if it's growing, which is the key indicator of concern. He shares examples from his lab and his company, Q Bio, where whole-body MRIs have led to early detection of serious conditions like lymphoma, pre-cancer, serious heart issues, and even early pancreatic cancer, often before symptoms appear. Q Bio has optimized the process to 35-40 minutes and provides actionable information for physicians.
vs alternatives
Traditional medical check-ups typically involve limited measurements, providing an incomplete picture of health. Whole-body MRIs offer a comprehensive, non-invasive internal view.
Personal experience
I've had 20 of these things, and I have nine nodules. And the point is that it's not whether you have nodules or not. Do you have any growing nodules? - Right. Right. - And that's the key. And if you've never done a baseline, you'll never know if they're growing.
So, we spun off a medical version of this. This is Q Bio that does whole-body MRI, which most people will tell you today, most physicians will tell you, you should not do that.
Also said
“And so, 49 people, we uncovered something pre-symptomatically, caught someone with early lymphoma, two people with pre-cancer, two people with serious heart issues, one from the genome sequencing, one from the wearables.”— Provides concrete examples of early disease detection through comprehensive monitoring.
“I think having these baselines is super important for everyone.”— Emphasizes the critical role of baseline data for tracking health changes.
A service that uses microsampling to profile 650 metabolites from a few drops of blood, identifying individual 'ageotypes' and providing AI-driven, personalized recommendations.
DisclosureDr. Snyder has a company involved in this, Iollo.
Iollo offers a commercially available service that allows individuals to understand their 'ageotypes' – specific aging patterns in different organ systems. Users receive a special kit to collect a few drops of blood, which are then analyzed using metabolomics and mass spectrometry to profile 650 metabolites. Based on these deep metabolic profiles, Iollo uses AI to generate specific recommendations, often including dietary advice, to improve markers related to kidney function, heart health, and other areas. Dr. Snyder states that 95% of people using Iollo improve their metabolic markers, demonstrating the actionable nature of this personalized data. This service represents a shift towards proactive, data-driven healthcare, moving beyond general advice to highly specific interventions.
vs alternatives
Traditional biological age tests (e.g., Horvath clocks) provide an overall number but lack actionable insights. Iollo breaks down aging into specific, modifiable pathways.
What they do is they're tracking your ageotypes, because they're doing these deep metabolic profiles, and they actually make... They use AI. They pull in things and make very specific recommendations. And then you can... They'll tell you exact foods to eat and things like that. And 95% of people improve their markers.
Also said
“It's a very simple test. You can get these little drops of blood, mail it in, and they'll profile 650 metabolites, and the information is actionable, they make recommendations, and it's not just, 'Exercise more, eat better,' but very, very specific.”— Highlights the simplicity of the test and the specificity of the recommendations.
“And if things are off in maybe a not so good direction, you can actually take action. You can say, 'Well, all right, my inflammation's fine. But my heart age is off.' And they can give you very specific recommendations to do around that.”— Illustrates how Iollo provides targeted advice based on specific ageotype imbalances.
Lines worth pulling out — contrarian, specific, or perfectly phrased
6 items
Well, I would say that high, long, prolonged spikes is obviously pretty bad. But certain things, like if you eat a grape, grape's pretty loaded with sugar, but it's a pretty transient spike. It'll go up. And so that would be a transient one, actually when you do strength training, for example, for exercise, you break down glucagon, which is a polymer of sugar that you break down, gives you energy. That's important for when you're doing exercise and training. And that will give a glucose spike. I get a glucose spike every morning when I weight train. So that would be a normal, healthy one, but it's transient. It goes away pretty quickly.
Distinguishes between 'bad' prolonged glucose spikes and 'normal, healthy' transient spikes (e.g., from fruit or exercise), clarifying a common misconception about glucose excursions.
So, I think getting your glucose under control, it is a bit of a problem for me. We tend to eat late in my household just because both my wife and I work kind of late. And so we tend to eat a little bit later, but I definitely do better if I can try and eat earlier, and I definitely don't snack before bedtime, that sort of thing. And these days, I try not to make my biggest meal my dinner, which again, can lead you into sleep with that.
Reveals a personal struggle with ideal meal timing despite deep scientific understanding, highlighting the practical challenges of implementing health protocols.
I like to say the things we do the most, we understand the least. Nutrition, right? How exactly does that work on all your different organs? Sleep. You know, I do like the idea that sleep, you may know your... You would know this better than me, but your spinal fluid inside you expands and contracts, the idea of emptying out the garbage, so to speak, when you sleep.
A profound statement on the current state of scientific understanding in fundamental human behaviors, emphasizing the complexity of nutrition and sleep.
I think medicine is broken. We tend to do sick care rather than health care.
A concise and critical assessment of the current healthcare system, advocating for a shift towards proactive health management.
I think the Horvath clocks are correct. Meaning they do measure biological age, but the problem is it's not actionable. What do you do? Your methylation pattern, that's a modification of DNA, has shifted, and it gives you an overall value, but what do you do with that? You don't know... Yeah. And they can predict something called 'GrimAge' these days, your time to death, your mortality. - Oh, nice. - Same thing. I mean, what are you going to do with that? What's special about the ageotypes is that they're breaking it down.
Critiques existing biological age metrics (Horvath clocks, GrimAge) for their lack of actionable insights, contrasting them with his 'ageotypes' concept which provides specific, modifiable targets.
I knew my CD8 T cells... Again, this gets a little specialized, but they were low, which I did see on the report, but it has this whole zinc recommendation thing, and I don't know if that's right, but I'm going to look into it more. It can make suggestions that no doctor's going to figure out with all this stuff, so you do need these new systems, and that is the future.
Illustrates the power of AI-driven analysis of complex biomarker data to generate highly specific, non-obvious health recommendations that surpass human diagnostic capabilities.
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Educational summary of the cited expert source — not medical advice. Open the source recording linked above and consult a qualified physician before acting on any protocol.
