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Episode
The Big Magnesium Concern (we’ve all been avoiding)
~49 min
Episode Brief·YouTube

The Big Magnesium Concern (we’ve all been avoiding)

Thomas DeLauer
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TL;DR

The four things you'd lose by not watching

4 items

TL;DR

The four things you'd lose by not watching

4 items
1

Calcium and magnesium compete for the same intestinal transporter (TRPV6) and can form insoluble complexes, so take them at least 2 hours apart — magnesium before bed, calcium with dinner.

2

High-dose zinc upregulates metallothionein, a protein that traps copper in intestinal cells and causes a copper deficiency; take zinc away from copper-containing foods.

3

Polyphenols in coffee and tea chelate non-heme iron, reducing absorption by up to 40–60%; wait 30–60 minutes after taking iron before drinking coffee.

4

A strategic supplement timing schedule — iron on empty stomach with vitamin C, fat-soluble vitamins with breakfast, zinc midday away from copper, calcium with dinner, magnesium before bed — prevents these conflicts and maximizes absorption.

Protocols

Concrete recipes — what, when, how much, and why

5 items

Take iron on empty stomach with vitamin C, wait before coffee

WhatTake iron supplements first thing in the morning on an empty stomach, with a little vitamin C to enhance absorption, and wait 30–60 minutes before consuming coffee or tea.
WhenUpon waking, before breakfast and coffee.
DoseIron supplement (dose not specified) + vitamin C; wait 30–60 minutes before coffee/tea.
For whomPeople who take iron supplements (especially non-heme iron).
WhyIron absorbs best in an acidic environment; vitamin C aids uptake. Coffee/tea polyphenols chelate iron, so a time gap prevents binding.
CaveatsThe speaker suggests first investigating whether iron supplementation is truly necessary, as anemia may sometimes be addressed with omega-3s or other interventions.

The speaker notes that iron is often over-supplemented, and he has other videos on alternative approaches to anemia. However, for those who do take iron, this timing is critical. The 30–60 minute window allows the iron to be absorbed before the polyphenol 'handcuffs' arrive. He references data from the American Journal of Clinical Nutrition showing coffee inhibits iron absorption by up to 40% and tea by over 60%.

Mechanism

Non-heme iron requires an acidic environment for optimal solubility and absorption. Vitamin C reduces iron to its more absorbable ferrous form. Polyphenols in coffee/tea bind iron into large, inert complexes that cannot pass through gut transporters.

iron absorbs best in an acidic environment. So if you take iron with a little bit of vitamin C, it can increase the uptake a little bit more and you really need to wait like 30 60 minutes before having coffee or tea.

Also said
“a cup of coffee with a meal can inhibit iron absorption by up to 40%. And for tea, it could be over 60%.”— Quantifies the absorption inhibition.

Take fat-soluble vitamins with a fat-containing breakfast

WhatTake vitamin D and vitamin E with breakfast that includes fat to ensure proper absorption.
WhenWith breakfast (containing fat).
DoseNot specified.
For whomAnyone supplementing with vitamins D or E.
WhyVitamins D and E are fat-soluble and require dietary fat for transport and absorption; taking them on an empty stomach reduces uptake.

The speaker briefly mentions this as part of the daily schedule. He emphasizes that while some absorption occurs on an empty stomach, it's suboptimal. This is a straightforward application of well-known nutritional science.

Mechanism

Fat-soluble vitamins are incorporated into micelles with dietary fats, which are then absorbed via the lymphatic system. Without fat, absorption is significantly impaired.

with breakfast, particularly if your breakfast has fat in it, this is the time that you take like the fat soluble vitamins. Okay, so take your vitamin D, take your vitamin E. Okay, they require fat to properly transport and absorb.

Take zinc midday away from copper-rich foods

WhatTake zinc supplements around lunchtime, either 30 minutes before or after the meal, and avoid taking it with foods high in copper or multivitamins containing copper.
WhenMidday, ideally on a somewhat empty stomach, separated from copper-containing foods.
DoseNot specified (common doses 50–100 mg mentioned as problematic).
For whomPeople taking zinc supplements, especially at higher doses.
WhyZinc upregulates metallothionein, which traps copper and prevents its absorption. Separating zinc from dietary copper minimizes this blockade.
CaveatsZinc can cause nausea on an empty stomach; if so, take it with a small amount of low-copper food.

The speaker explains that many foods naturally contain copper, and multivitamins often include it. Taking zinc with meals that have copper can still induce the blockade. The ideal is to take zinc in a semi-fasted state, such as 30 minutes after lunch or before a meal, to reduce copper co-ingestion. He acknowledges that some people need to take zinc with food to avoid nausea, in which case they should choose low-copper foods.

Mechanism

High intestinal zinc triggers gene expression of metallothionein, a protein that binds copper with high affinity inside enterocytes, preventing copper from entering the bloodstream. The copper is lost when the cells are shed.

just take your zinc separate in almost a fasted state.

Also said
“Zinc will sometimes make people nauseous, so they want to take it with food. So, you could just take it with something that is low copper.”— Practical caveat for those who experience nausea.

Take calcium with dinner, magnesium before bed

WhatTake calcium supplements with dinner (or get calcium from whole food), and take magnesium glycinate a couple of hours later before bed.
WhenCalcium with dinner; magnesium before bed, separated by at least 2 hours.
DoseMagnesium: a few hundred milligrams of magnesium glycinate. Calcium dose not specified.
For whomAnyone taking both calcium and magnesium supplements.
WhySeparating them prevents competition for the TRPV6 transporter and avoids the formation of insoluble calcium-magnesium-phosphate complexes in the gut.
CaveatsThe speaker personally recommends getting calcium from whole food sources rather than supplements. Magnesium glycinate is suggested for its sleep benefits.

The speaker emphasizes that this timing strategy directly addresses the two mechanisms of conflict. Taking calcium with dinner allows it to be absorbed with food, while magnesium before bed not only avoids the competition but also leverages magnesium's calming effects for sleep. He notes that even if you don't take calcium supplements, a calcium-rich meal can still interfere, so the separation is key. The recommendation of magnesium glycinate is based on its high bioavailability and specific benefits for sleep.

Mechanism

Calcium and magnesium are both divalent cations that share the TRPV6 channel for absorption; high calcium outcompetes magnesium. Additionally, in the alkaline small intestine, calcium and phosphate can precipitate with magnesium into insoluble complexes that are not absorbed.

Personal experience

I also personally recommend you get your calcium from real whole food. This is going to be much better.

by separating the magnesium by maybe a couple of hours and taking the magnesium before bed, you prevent that direct competition and you like sort of stop that whole one lane road issue into your body so you don't have those mineral rocks that form in the gut that don't get absorbed.

Take vitamin K2 in the evening, separate from vitamin E

WhatTake vitamin K2 with a fat-containing dinner, and avoid taking it at the same time as vitamin E to improve absorption of both.
WhenWith dinner (containing fat), not together with vitamin E.
DoseNot specified.
For whomPeople supplementing with vitamin K2 and vitamin E.
WhySeparating K2 from vitamin E may enhance absorption of each, and taking K2 with fat aids its uptake. Vitamin D can be taken in the morning.
CaveatsThe speaker notes that many people take D and K together, which is fine, but separating them may be even better.

This is a brief addition to the timing protocol. The speaker acknowledges that he didn't cover K2's mechanism earlier but includes it because many people take D and K. He suggests that taking D in the morning and K2 in the evening with dinner (which typically contains fat) can optimize absorption. He also warns not to take vitamin E with K2, implying a competitive interaction.

Mechanism

Vitamin K2 is fat-soluble, so it requires dietary fat. The speaker suggests that vitamins E and K may compete for absorption pathways, though he does not elaborate on the specific mechanism.

if you separate the vitamin K2 from your vitamin E, then you can actually get more absorption.

Also said
“vitamin K2 in the evening, vitamin D in the morning actually works really well.”— Specific timing recommendation for D and K.

What's new

Personal practice updates, fresh positions, predictions

4 items

Calcium and magnesium form insoluble complexes in the gut

Calcium not only competes with magnesium for absorption via the TRPV6 channel but also precipitates with phosphate and magnesium in the alkaline small intestine, creating unabsorbable solid globs that are flushed out.

Why this matters: Many people take calcium and magnesium together for bone and sleep health, unaware that this combination can render the magnesium useless.

Background

Magnesium is widely taken for sleep, muscle cramps, and general health. Calcium is often taken for bone health. The common practice is to take them together or without timing consideration.

The speaker explains that the conflict is twofold. First, both minerals are divalent cations of similar size and charge, so they compete for the same protein channel (TRPV6) in the intestinal lining. When calcium is present in high amounts, it creates a 'traffic jam' that blocks magnesium entry. Second, and more directly, in the alkaline environment of the lower small intestine, calcium and phosphate can precipitate with magnesium to form insoluble complexes — essentially tiny rocks that the gut cannot absorb. The magnesium is then excreted. This means that taking a magnesium supplement with a calcium-rich meal or supplement can completely negate its benefits. The speaker cites a study in the journal Nutrition supporting this interaction.

they form these weird little globs of like insoluble magnesium, calcium, phosphate glob. Okay, your intestinal lining cannot absorb a solid rock.

Also said
“both calcium and magnesium are cations that are divalent. They have similar charge and similar size. So they compete for entry into your actual intestinal cells. So they share the same what is called a protein channel. And if you're interested, it's the TRPV6 channel.”— Explains the competitive transport mechanism at the cellular level.
“the magnesium that you took for sleep and muscle function is literally flushed out.”— Direct consequence of the insoluble complex formation.

Coffee polyphenols chelate iron, drastically reducing absorption

Polyphenols in coffee and tea act as chelators that bind non-heme iron, forming large inert complexes that cannot be absorbed, reducing iron uptake by up to 40% for coffee and over 60% for tea.

Why this matters: Many people take iron supplements or eat iron-rich meals with coffee, unknowingly sabotaging their iron status.

Background

Iron is often supplemented for anemia, and coffee is a daily habit. The interaction is well-documented but frequently ignored.

The speaker explains that compounds like tannic acid and chlorogenic acid in coffee are powerful chelators, particularly for non-heme iron (the form found in supplements and plant foods). These polyphenols bind directly to iron in the gut, creating an iron-polyphenol complex that is too large and inert to pass through iron transporters. The American Journal of Clinical Nutrition published research showing that a cup of coffee with a meal can inhibit iron absorption by up to 40%, and tea can inhibit over 60%. The speaker notes that this chelation can also drag other minerals along, making it a 'massive chelator' once iron is attached. He advises waiting 30–60 minutes after taking iron before consuming coffee or tea.

the polyphenols that are in coffee are like molecular handcuffs.

Also said
“a cup of coffee with a meal can inhibit iron absorption by up to 40%. And for tea, it could be over 60%.”— Quantifies the magnitude of the effect from published research.
“they create a new like iron polyphenol complex that is too big and essentially inert and cannot pass through the iron transporters in the gut wall.”— Describes the direct binding mechanism that blocks absorption.

Strategic supplement timing protocol to avoid mineral conflicts

A daily schedule: iron on empty stomach with vitamin C (wait before coffee), fat-soluble vitamins with breakfast, zinc midday away from copper, calcium with dinner, magnesium before bed, and vitamin K2 in the evening separate from vitamin E.

Why this matters: Provides a concrete, actionable plan that resolves the absorption conflicts discussed, turning knowledge into practice.

Background

Most people take supplements haphazardly, often with meals or in combinations that lead to competition and reduced efficacy.

The speaker synthesizes the earlier mechanisms into a full-day timing protocol. Upon waking, iron (if needed) should be taken on an empty stomach with vitamin C to enhance absorption in an acidic environment, followed by a 30–60 minute wait before coffee. Breakfast with fat is the time for fat-soluble vitamins D and E. Zinc is best taken midday, 30 minutes before or after lunch, away from copper-containing foods to avoid the metallothionein trap; if nausea occurs, it can be taken with a low-copper food. Dinner with fat is ideal for calcium (preferably from whole food) and vitamin K2, but K2 should be separated from vitamin E to improve absorption. Finally, magnesium glycinate (a few hundred milligrams) is taken before bed, a couple of hours after calcium, to avoid competition and leverage its sleep benefits. The speaker stresses that this isn't about adding more supplements but being strategic with existing ones.

Personal experience

The speaker personally recommends getting calcium from whole food and prefers magnesium glycinate before bed.

by separating the magnesium by maybe a couple of hours and taking the magnesium before bed, you prevent that direct competition and you like sort of stop that whole one lane road issue into your body so you don't have those mineral rocks that form in the gut that don't get absorbed.

Also said
“iron absorbs best in an acidic environment. So if you take iron with a little bit of vitamin C, it can increase the uptake a little bit more and you really need to wait like 30 60 minutes before having coffee or tea.”— Specific timing and co-factor for iron absorption.
“zinc is best like midday on a somewhat empty stomach. Zinc will sometimes make people nauseous, so they want to take it with food. So, you could just take it with something that is low copper.”— Practical advice for zinc timing and managing nausea.

Probiotic Seed improved sleep, appetite, and cravings

The speaker shares his personal experience with the symbiotic probiotic Seed, which he started 5 years ago and credits with improving his sleep, appetite, and eliminating weird cravings driven by gut dysbiosis.

Why this matters: A first-person anecdote linking a specific probiotic to tangible health improvements, reinforcing the gut-nutrient absorption connection.

Background

The speaker had previously discussed how gut health is critical for nutrient absorption and preventing large particles from entering the bloodstream.

After explaining the mineral conflicts, the speaker pivots to gut health, emphasizing that a healthy gut environment is essential for proper nutrient absorption and barrier function. He introduces Seed, a symbiotic (prebiotic + probiotic) with a capsule-in-capsule technology. He states it's the only probiotic he uses because most are 'garbage.' He recounts that within a short time of starting it 5 years ago, he noticed improvements in sleep, appetite regulation, and the disappearance of odd cravings he now attributes to gut microbiome imbalances. He recommends it as a way to support overall nutrient absorption and gut integrity.

Personal experience

I started taking it about 5 years ago. It was a gamechanger for me. It helped my sleep. It helped my appetite. I had weird cravings before that I didn't realize were being driven probably by my gut bio.

It's the only probiotic I'll use because most of them I quite frankly are garbage.

Also said
“It is a symbiotic. So, it has a prebiotic and a probiotic. So, a capsule inside of a capsule. Really fascinating tech.”— Describes the product's unique formulation.
“This is something that you can start taking and start feeling almost immediately.”— Claims rapid onset of benefits.

Recommendations

Products, supplements, and tools mentioned in the episode

2 items

Get calcium from whole food sources

Practice

The speaker personally recommends obtaining calcium from real whole foods rather than supplements, as part of the strategy to avoid absorption conflicts.

While discussing the calcium-magnesium timing protocol, the speaker interjects that he prefers people get calcium from dietary sources. This aligns with his overall philosophy of food-first nutrition. He doesn't elaborate on specific foods but implies that whole-food calcium is less likely to cause the same competitive issues or may be better regulated by the body.

Personal experience

I also personally recommend you get your calcium from real whole food. This is going to be much better.

I also personally recommend you get your calcium from real whole food.

Find Get

Watch the video on carnosine for insulin resistance

Practice

The speaker briefly mentions a separate video he made about carnosine, stating that a few grams can have a profound effect on metabolic health and insulin resistance.

At the end of the video, the speaker teases another piece of content on carnosine, a dipeptide that may help with insulin resistance. He says metabolic health is one of the most important things and links to that video. This is a cross-promotion of his own content.

Just a few grams of this stuff has a really profound effect.

Find Watch
Disclosed sponsorships1speaker disclosed

Seed probiotic (symbiotic)

Supplement Sponsored · disclosed

Recommended to improve gut health, nutrient absorption, and overall well-being. The speaker credits it with better sleep, appetite regulation, and reduced cravings.

DisclosureLink in the video description, likely an affiliate partnership.

The speaker introduces Seed after discussing how gut integrity is crucial for preventing large, inflammatory particles from entering the bloodstream and for optimal nutrient absorption. He describes it as a symbiotic with a capsule-in-capsule delivery system, containing both prebiotics and probiotics. He claims it's the only probiotic he uses because most others are ineffective. He shares that he started taking it 5 years ago and noticed rapid improvements in sleep, appetite, and the disappearance of unusual cravings he attributes to gut dysbiosis. He strongly recommends it as a foundational supplement for gut health.

vs alternatives

most of them I quite frankly are garbage.

Personal experience

I started taking it about 5 years ago. It was a gamechanger for me. It helped my sleep. It helped my appetite. I had weird cravings before that I didn't realize were being driven probably by my gut bio.

It's the only probiotic I'll use because most of them I quite frankly are garbage.

Also said
“It is a symbiotic. So, it has a prebiotic and a probiotic. So, a capsule inside of a capsule. Really fascinating tech.”— Highlights the unique formulation.
“This is something that you can start taking and start feeling almost immediately.”— Claims rapid onset of benefits.
Find Seed

Notable quotes

Lines worth pulling out — contrarian, specific, or perfectly phrased

4 items
they form these weird little globs of like insoluble magnesium, calcium, phosphate glob. Okay, your intestinal lining cannot absorb a solid rock.
Vivid, memorable imagery that drives home the physical reality of the calcium-magnesium interaction.
the polyphenols that are in coffee are like molecular handcuffs.
A striking analogy for the chelation of iron by coffee compounds.
It's the only probiotic I'll use because most of them I quite frankly are garbage.
A bold, unfiltered endorsement that stands out and signals strong personal conviction.
Why take supplements if you're going to waste them? If you're going to take them, you might as well learn how to use them and get an actual physiological return.
Encapsulates the entire video's pragmatic philosophy — be strategic, not wasteful.

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Topics covered

magnesiumcalciumzinccopperironpolyphenolscoffeeteasupplement-timinggut-healthprobioticsseedcarnosineinsulin-resistance
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