The gut microbiome is a master regulator of health, influencing everything from autoimmune diseases to neurological conditions, and contains vastly more genetic information than human DNA.
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Current commercial microbiome tests are largely premature and potentially dangerous, as they lack the depth and integration with host metabolomics needed for accurate, personalized recommendations.
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Probiotics should be chosen based on specific health goals (targeted strains) or for broad-spectrum benefits (complex consortia), with emphasis on purity, potency (survival to the colon), and proven efficacy.
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Antibiotics cause significant, though often temporary, damage to the gut microbiome and gut barrier. Specific probiotics, like DS-01, have shown promise in accelerating recovery of microbial diversity and restoring gut barrier integrity post-antibiotic use.
Protocols
Concrete recipes — what, when, how much, and why
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The 5R Program for Gut Health
WhatA systematic approach to repairing gut health by removing harmful elements, replacing missing components, reinoculating with beneficial bacteria, repairing the gut lining, and restoring nervous system balance.
WhyThis methodology, developed in functional medicine, addresses the root causes of gut dysbiosis and has been observed to lead to significant improvements in various chronic conditions.
The speaker, Mark Hyman, recounts his personal experience with severe gut issues due to mercury poisoning, which led him to functional medicine. He explains that early functional medicine practitioners, despite a less deep understanding of the microbiome, successfully treated patients using this 5R framework. The program involves: 1) Remove: eliminating 'bad stuff' like pathogens or irritants; 2) Replace: supplementing missing digestive enzymes or acids; 3) Reinoculate: introducing good bacteria; 4) Repair: healing the gut lining; and 5) Restore: calming the nervous system. He witnessed 'miracles' in patients, with conditions like migraines and autoimmune diseases resolving, highlighting the profound impact of gut health on overall well-being.
Personal experience
I began to learn about functional medicine and understand the role of the gut in so many diseases that were chronic and at the very early stages of functional medicine we didn't really have a very deep understanding of the microbiome it was just sort of like we understood this idea of disbiosis or imbalancing the gut Flora we understood that if we helped repair the gut that people would get better and we had a methodology for doing it which is to remove the bad stuff you know replace what's missing reinoculate with good bacteria repair the gut lining kind of restore the nervous system and calm things down and that really worked and I would see honestly Miracles when I would do this with patients their migraines would go away their autoimmune disease would go away their metabolic Health would improve I mean I I just was sort of shocked and and it was striking to me that I just never learned about this in medical school and yet it was seemingly among the most important things I could do in treating almost any patient with almost anything right
we had a methodology for doing it which is to remove the bad stuff you know replace what's missing reinoculate with good bacteria repair the gut lining kind of restore the nervous system and calm things down and that really worked.
Choosing Probiotics: Targeted vs. Broad-Spectrum
WhatSelect probiotics based on whether you seek a specific health outcome (targeted strains) or general, multi-system benefits (complex consortia).
WhyDifferent probiotic strains have distinct mechanisms and effects; a single strain or simple mix is unlikely to address multiple complex health goals.
The speaker outlines two main categories for probiotic selection. The first is 'targeted' probiotics, where specific strains are chosen for a particular indication, such as weight loss, mood improvement, or skin health. These are often very specific microbes designed to work on particular axes. The second category is 'broad-spectrum consortia,' which involve many different strains, often from similar species, designed to provide a wider range of benefits across multiple organ systems. The speaker emphasizes that achieving broad health benefits typically requires a more complex mix of microbes rather than just one or two strains, as seen in fermented foods like kimchi. The goal is to maximize outputs by leveraging the 'network effect' of diverse microbes working together.
there's two major classes of probiotics one is targeted for a specific indication I want to lose weight I want to improve my mood uh I want to signal to improve my skin you know they're very different microbes that work on these different axes and they're usually very specific so it's not necessarily uh a bunch of bugs that will do that but you could find ones that are very targeted that have that targeted effect and so I think that this is bucket one bucket two are you is your I just want to stop there for a sec that's an incredible statement you just said was that there are different strains of probiotics that have different effects for different diseases and conditions.
WhatWhen selecting a probiotic, assess its purity (only listed bacteria, no contaminants), potency (guaranteed live cells reaching the colon), and efficacy (scientifically proven benefits).
WhyMany commercial probiotics fail to deliver on their claims due to poor manufacturing, lack of survival in the GI tract, or insufficient scientific backing.
The speaker details three crucial criteria for evaluating probiotics. Purity means that only the bacteria listed on the label are present, with no contaminants, verified through rigorous quality control and genomic sequencing of each batch. Potency refers to the number of live, active cells that actually reach the colon, not just what's stated on the label. Many probiotics experience significant die-off in the stomach or are not alive to begin with, rendering them ineffective. The speaker highlights the importance of delivery systems, like Seed's capsule-in-capsule, designed to ensure survival through the harsh stomach environment. Efficacy requires that the specific strains have scientific evidence supporting their claimed health benefits, moving beyond generic 'probiotic' claims to strain-specific effects on particular organ systems or conditions.
there's three layers to it there's Purity there's potency and there's efficacy uh Purity means that there's the the bacteria which are you list and none others it's very simple and that's done by very good quality control so you're sequencing at the IND level of individual genes all the bacteria in your product you know them you get a fingerprint every time you do a fermentation every time you do a production you get a fingerprint and you know that those organisms are there and nothing else is there and so this is the the most important question question to ask from um a sake of Purity potency is not just what's written onto the label because that can be very misleading.
Post-Antibiotic Gut Recovery with Probiotics
WhatUtilize specific probiotics after antibiotic treatment to accelerate the recovery of gut microbial diversity and restore gut barrier integrity.
WhyAntibiotics severely disrupt the microbiome and damage the gut barrier, and while the microbiome eventually recovers, probiotics can guide it back to a healthier state and mitigate barrier damage.
Antibiotics are described as the most acute threat to the microbiome, causing significant damage. While the microbiome does recover in biomass within 6 months to 2 years, its composition often changes, with a loss of rare species and the emergence of new ones. A study involving DS-01 after antibiotic use showed that the probiotic group experienced a greater rebound in rare species and an enrichment in butyrate-producing organisms, even if butyrate levels weren't immediately elevated (as it was being used by colonocytes for recovery). Crucially, the study also found that antibiotics cause over 90% damage to the gut barrier, leading to increased permeability (leaky gut). DS-01 demonstrated a strong 'rescue effect,' almost completely restoring the gut barrier to a less permeable state, with effects lasting weeks after antibiotic cessation. This suggests probiotics can actively help the gut recover from antibiotic-induced damage.
what was striking about DS1 is that we show compared to Placebo we showed a very strong rescue effect and an almost complete rescue effect of that gut barrier with effects that persisted out weeks after the course of antibiotics and so this is something which is you know it's again it's very interesting you think about your environment you think about uh disruptions you think about uh what could probiotics be good for here's data that says that in a in a disrupted environment probiotics and ds01 in in particular can have a rescue effect uh on those barrier disruptions it can kind of return the gut barrier to a less permeable state so you you stop sort of having a leaky gut that's amazing.
What's new
Personal practice updates, fresh positions, predictions
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Microbiome data interpretation challenges
Small microbiome datasets often yield statistically significant but inconsistent results regarding health outcomes, making it difficult to draw reliable conclusions.
Why this matters: This highlights a critical flaw in much of the published microbiome research and explains why contradictory findings are common.
The speaker explains that many microbiome studies, even those with 500 participants, can identify specific bacteria linked to conditions like obesity or leanness. However, if the same question is asked of a different 500-person subset from the same large dataset, a different set of bacteria might be identified as significant. This inconsistency, despite statistical significance (low P-values), makes the field confusing and leads to conflicting reports. The speaker emphasizes that reliable findings emerge only when questions are asked of much larger, more robust datasets (e.g., 3,500 people in their example), where the same microbes consistently appear as significant.
This is what makes microbiome so confusing and why it seems that there's contradictory results all the time because small cross-sections of microbiome data that are uncontrolled will give you significant findings all the big journals were publishing mic this microb predicts finds depression this microb finds this but then oh but wait a second does this does this also relate to this or this study actually says that it doesn't or it doesn't in a Chinese population or there ended up being so many caveats.
Acacia muciniphila and diet interaction
The beneficial effects of the bacterium Acacia muciniphila can be reversed, becoming pro-inflammatory, if an individual consumes a low-fiber diet.
Why this matters: This challenges the simplistic view of 'good' bacteria, showing that their impact is context-dependent and heavily influenced by dietary fiber.
Acacia muciniphila is generally considered a beneficial bacterium, closely associated with the gut lining and linked to positive metabolic features. However, recent research (November 2023) indicates that in the absence of sufficient dietary fiber, Acacia can exacerbate food allergies. The mechanism proposed is that if these mucin-degrading organisms don't have enough fiber to feed on, they will degrade the host's mucin layer in a pro-inflammatory manner. This underscores the critical importance of consuming adequate fiber alongside any probiotic, as the dietary context can fundamentally alter a bacterium's effect from beneficial to harmful.
a paper which came out in November of 2023 and actually said that acrania in the presence of a low fiber diet can exacerbate food allergies and so it makes sense right if if you're eating a lot of fiber and you're producing a ton of substrates for these organisms and others to degrade they're generally healthy if there's not enough positive dietary inputs for mucin degraders then what are they going to eat they're going to degrade your mucin and they're going to degrade it in ways that can be pro-inflammatory so you've got to eat the fiber with the probiotic what absolutely critical in the case of acran or other mcin degrading organisms this paper suggests what many in the field have talked about but was this paper was the first to prove that is not just mitigates the beneficial effects but actually can turn that organism into something which is bad.
Polyphenols as prebiotics
Polyphenols, rather than just fiber, are powerful prebiotics that significantly impact the gut microbiome, with less than 5% being directly absorbed into circulation.
Why this matters: This expands the understanding of prebiotics beyond traditional fibers and highlights the gut microbiome's role in metabolizing these compounds.
Historically, the term 'prebiotic' was almost exclusively associated with dietary fibers. However, the speaker explains that polyphenols and flavonoids from the plant kingdom are also crucial for gut health. These large molecules are poorly absorbed directly into the bloodstream (less than 5%), meaning a significant portion reaches the gut where they are metabolized by the microbiome. This metabolism by bacteria produces secondary and tertiary metabolites that have powerful biological effects. The speaker's company, Seed, specifically focused on pomegranate polyphenols (punicalagins, ellagic acid) due to their strong signal in promoting the growth of bacteria capable of degrading these plant compounds, creating a two-way beneficial relationship where polyphenols feed the microbiome and the microbiome changes in response.
polyphenols are a very big molecule so that's one of our first discoveries is that polyphenols are very large like structurally physically they're very large and so about I think it's less than 5% it could it's I want to say 4% but I believe it's less than 5% of polyphenols are actually absorbed into your circulation and into your bloodstream directly and so it's this very very powerful way to impact the gut microbiome because are just sending so much of them there.
Future of personalized microbiome medicine
The future of microbiome science involves large, controlled, longitudinal datasets combined with AI and bioinformatics to create truly personalized probiotic and dietary recommendations.
Why this matters: This outlines a clear vision for how the field will evolve to overcome current limitations and deliver precise health interventions.
The speaker envisions a future where personalized microbiome interventions are possible, but stresses that this requires massive, deeply phenotyped datasets. He describes a 20-year study involving 13,000 people, tracking everything from their diet and medication history to genomics, metabolomics, sleep, and continuous glucose monitoring. This level of comprehensive, longitudinal data, combined with advanced bioinformatics and AI, will allow scientists to identify specific bacterial networks responsible for various health outcomes, including the production of neuroactive metabolites linked to mood disorders. While acknowledging that this future is still 2-3 years away, he expresses confidence that such precision medicine, including personalized probiotics and nutrition, will eventually transform healthcare.
The future is real but we're not there and but we're getting there we're going to get there we're going to get there I believe we're gonna get there and on our way yeah personalized uh pharmacogenomics we're GNA have personalized nutrition we're going to have personalized probotics.
Recommendations
Products, supplements, and tools mentioned in the episode
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Consuming Olive Oil for TMAO Modulation
Practice
For individuals concerned about TMAO levels and cardiovascular risk, consuming olive oil, particularly for its DMBB content, is highly recommended.
TMAO is a compound produced by gut bacteria from certain foods (like meat or fish) and has been linked to heart disease. While some probiotics might have a minor impact on TMAO, research from the Cleveland Clinic suggests that olive oil, specifically its DMBB component, is the most potent modulator of TMA and TMAO production in the gut microbiome. The speaker implies that its effect is so significant that it surpasses any probiotic in this regard, humorously suggesting one should 'drink olive oil like water' if this is a primary concern.
a group at the Cleveland Clinic has actually shown that olive oil and particularly dmbb from olive oil is the most potent modulator of of TMA and tmao production in in the gut microbiome so for those that find this area interesting I would drink olive oil like water and uh you won't be able to top the effect of that from any any probiotic in the world.
A broad-spectrum, multi-strain probiotic and prebiotic (synbiotic) designed to support various organ systems, including gut health, skin health, and metabolic function.
DisclosureThe speaker, Raja Dhir, is involved with the company Seed, which produces DS-01.
DS-01 is described as a complex synbiotic containing 24 different strains across 12 species, making it genomically rich with a high number of unique microbial genes. It delivers 50 billion active cells, with viability measured by flow cytometry to ensure intact cell walls. The product utilizes a unique capsule-in-capsule delivery system, developed through 50 iterations, to ensure the live bacteria survive stomach acid and are released in the upper small intestine for optimal immune and metabolic benefits. Beyond gut health (transit time, stool consistency, gas production), DS-01 has shown benefits for the gut-skin axis (inflammation, psoriasis, atopic dermatitis), and specific organisms within it can modulate cholesterol reuptake. The prebiotic component consists of polyphenols from pomegranate, which feed the gut microbiome and promote the growth of beneficial bacteria, leading to increased production of postbiotics like Urolithin A.
vs alternatives
Unlike many probiotics that contain only one or two strains or have high die-off rates, DS-01 is a complex consortia with a high number of diverse strains, a specialized delivery system for survival, and a unique polyphenol-based prebiotic component.
DS1 is a a very complex uh probiotic consortia there's 24 different strains and uh across 12 species so uh it's it's it's a it's complex in the sense that there's a very high number of unique genes so DSO one has more unique microbial genes than any other probiotic that I'm aware of on the market and and we've looked tested this uh extensive L um it is about 50 billion act AFU the potency is about 50 billion active cells and these are live cells that have uh active in the sense that we use flow cytometry which means that their cell wall is intact that's how we how we measure our viability and uh the strains themselves have very strong data across many different organ systems of the body and so it's a a kind of Baseline probiotic it's a many inone uh probiotic with strains that have have targeted different organ systems in the body.
Lines worth pulling out — contrarian, specific, or perfectly phrased
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you have 37 trillion cells and there's probably at least that many bacteria in your gut what's different though is that there's a lot of variety in those bacteria and each of those bacteria have different genes and each of the genes of the bacteria produce unique metabolites or proteins and those are biologically active compounds that we absorb that regulate our entire biology our hormones our brain chemistry our immune system our risk of a whole host of diseases and our Regulatory and fact there may be I've heard I'd love to hear your opinion about this but I've heard anywhere from a third to half of all the metabolites in our blood come from the metabolites that are produced in your gut by your gut microbiome that then are absorbed across your gut lining and end up in your blood and then regulate your biology so I mean maybe you were just carry your pigeons for bacteria I don't know who's in charge here but it seems like they're they're in charge a lot.
This quote vividly illustrates the profound and pervasive influence of the gut microbiome on human biology, suggesting bacteria might be the 'real' regulators of our health.
I think it's dangerous I think it's dangerous to sell a a a insights to a customer before those insights have been formed or to ask a customer to pay for you to to to generate insights um before you've before you've uh made sense of that data and so I think it's very early for microbiome uh Diagnostics.
This is a strong, contrarian statement against the current commercial microbiome testing industry, labeling it as potentially harmful due to premature and unvalidated insights.
anytime you hear somebody say oh well you don't have the best bacteria to metabolize pom granate or broccoli and so that's a food you should avoid uh you know I just think that that flies in the face of all practical nutrition advice and I think that should be ignored.
This directly challenges a common, often misleading, recommendation from some commercial microbiome tests, advocating for ignoring advice that contradicts basic nutritional principles.
I do not think that most people in the absence of any gastrointestinal or gut microbiome related you know people that I call like your super healthy individuals that that exercise well but not too much they're not Elite athletes because that creates carries its own risk or not over endurance athletes uh people that eat virtually no processed foods and that have no uh environmental toxins in their environment you've talked before where where you can even find that in ways that you wouldn't expect which we can talk about later so if you're kind of living in the wild if you're growing all of your own food if you're regulating contaminants in in your water supply um and in the soil of the food that you're eating uh and you're eating a very diverse uh plant an animal- based diet I think that that's that that that you're in more or less Peak Performance and lastly is uh you didn't have heavy antibiotic usage uh either early in life or at any period throughout your life or periods of uh disruption.
This provides a very specific and demanding definition of who might NOT need probiotics, highlighting the extreme conditions required for optimal natural gut health in the modern world.
I remember sitting across from him at a conference where he said yeah well do probiotics work do they do this and uh I had a hypothesis that yet that said yes and he says well I'd love to test it and a year later we we're doing a clinical trial together and so this was a really fun uh trial to do and uh basically we took um uh IBS type c and IBS Type M although many more people came into the trial that were IBS Type M and it's very very common IBS I think you know it's about 10% of the population uh if not more specifically uh maybe that's number of days or for insurance purposes versus population but yeah it's a it's a very high amount I mean listen the number one reason that people visit doctors is because they have GI symptoms whether it's heartburn reflux bowel bloating I mean it's the number one reason people visit the doctor.
This quote highlights the prevalence and impact of IBS, framing it as a major reason for doctor visits, and sets up the context for the clinical trial on probiotics for IBS.
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