Magnesium Glycinate 400mg | TRAACS Bisglycinate for Sleep, NAD+ Methylation & Vitamin D Activation

The 30-second answer

Magnesium is the mineral that runs the machinery you've been buying supplements to support. It is a required cofactor in over 600 enzymatic reactions including the ones that convert NMN into NAD+, that activate Vitamin D into its hormone form, that build ATP from glucose and fat, and that let muscles relax after they contract. The Western diet provides roughly half of what those reactions need. Roughly two-thirds of American adults fall short of the RDA, and the soft signs of insufficiency (poor sleep, muscle cramps, restless legs, anxiety that won't quit, irregular heartbeat, constipation) are so common we've stopped calling them deficiency at all.

Magnesium Glycinate (also called magnesium bisglycinate) is the form most often used in clinical research and in physician-supervised longevity protocols: magnesium bound to two glycine amino acids, absorbed through amino-acid transporters at near-80% efficiency, with minimal laxative effect even at full daily dose. The glycine half is itself a calming neurotransmitter that supports slow-wave sleep, which is why this specific form is the one Andrew Huberman, the Bryan Johnson Blueprint protocol, and Rhonda Patrick all default to for daily use.

If you take any of the longevity supplements in this catalog (NMN, Liposomal NAD+, Vitamin D, Resveratrol, TMG, B-vitamins) you are spending those compounds on suboptimal chemistry whenever magnesium is low. Two large mortality datasets (Fang et al., BMC Medicine 2016, n > 1 million; Zhao et al., Nutrients 2020 meta-analysis) found that each 100mg/day increase in dietary magnesium intake associated with a 22% lower all-cause mortality risk and a 19% lower type 2 diabetes risk. Magnesium is the foundation that sits underneath every other longevity intervention.

This bottle. 60 vegetarian capsules of TRAACS®-patented magnesium bisglycinate chelate, 400mg of elemental magnesium per 2-capsule serving (the number on the label is elemental magnesium, not the chelate weight, so the dose is real). No magnesium stearate, no silicon dioxide, no titanium dioxide, no soy oil. Manufactured in a U.S. cGMP facility, third-party tested for identity, potency, heavy metals, and microbials. One bottle = 30 days at the standard pre-bed protocol.

Why magnesium ended up in serious longevity research

For decades magnesium was treated as a "nutritional minimum" (hit the RDA, move on). The longevity reframing came from three lines of evidence converging in the 2010s.

The mortality data. The Framingham Offspring Study and the meta-analyses that followed it (Fang et al., BMC Medicine 2016, pooling 40 prospective studies and 1,000,000+ participants) found that each 100mg/day increase in dietary magnesium associated with a 7% lower risk of cardiovascular disease, a 19% lower risk of type 2 diabetes, and a 22% lower risk of all-cause mortality, holding after adjustment for age, BMI, smoking, alcohol, physical activity, energy intake, and dietary calcium and potassium. The effect was largest at the lower end of the intake distribution, which is exactly where most modern Western diets sit (220–270mg/day vs an RDA of 320–420mg).

The mechanism work. Researchers studying why NMN and other NAD+ precursors produced inconsistent results in aging humans kept finding the same upstream pattern: every step of NAD+ chemistry runs on magnesium. The NAMPT enzyme that performs the rate-limiting step in NAD+ biosynthesis (NMN → NAD+) is a magnesium-dependent enzyme, with two Mg²⁺ ions in the catalytic site (Burgos & Schramm, Biochemistry 2008). The SAMe → SAH methylation cycle that supplies the methyl groups TMG and methyl-donors support is also Mg-dependent. The conversion of inactive 25-hydroxy-Vitamin D into active 1,25-dihydroxy-Vitamin D in the kidney is performed by CYP27B1, a magnesium-dependent enzyme (Uwitonze & Razzaque, JAOA 2018). People with low intracellular magnesium were spending their NAD+ precursors and methyl donors and Vitamin D on basic survival chemistry, with little left over for the cellular renewal those compounds are supposed to fund.

The sleep evidence. The cellular work most longevity research is trying to unlock (autophagy, mitochondrial repair, glymphatic clearance of brain waste, growth-hormone release, glucocorticoid normalization) happens during deep sleep. Magnesium is required for the GABA-A receptor pathway that initiates and sustains slow-wave (N3) sleep, and for the NMDA-receptor antagonism that prevents nighttime arousals. Two double-blind randomized trials (Abbasi et al., Journal of Research in Medical Sciences 2012; Held et al., Pharmacopsychiatry 2002) showed measurable improvements in sleep architecture (sleep onset latency, slow-wave sleep duration, serum cortisol, sleep efficiency) with supplementation in older adults with baseline insufficiency. If a longevity stack doesn't fix sleep, much of it is being spent on a body that can't repair itself overnight. Magnesium glycinate is the cheapest, safest, best-tolerated intervention in that loop.

What magnesium actually does (eight roles)

1. Energy production (Mg-ATP). Every molecule of ATP your mitochondria produce circulates as Mg²⁺-ATP. The magnesium ion is what makes ATP biologically active: without it, ATP is a chemically inert phosphate string that no enzyme can use. Low magnesium and your CoQ10 + NMN + PQQ + Urolithin A stack still produces ATP, but the ATP that comes out is harder for downstream enzymes to use.

2. NAD+ biosynthesis (NAMPT cofactor). NAMPT, the rate-limiting enzyme in the NAD+ salvage pathway, requires two Mg²⁺ ions in its catalytic pocket (Burgos & Schramm 2008). Insufficient intracellular magnesium and your NMN supplementation hits a kinetic ceiling regardless of how much you take. This is one of the under-appreciated reasons for inconsistent NAD+ supplementation responses in human cohorts. Add magnesium and the dose-response curve straightens out.

3. Sleep architecture (GABA + NMDA). Magnesium activates the GABA-A receptor (the same target as benzodiazepines and Z-drugs but without the hangover, dependence, or REM-suppression) and antagonizes the NMDA receptor (which prevents the glutamate-driven nighttime arousals that fragment sleep). The glycine half of glycinate adds its own GABA-promoting effect at the spinal level and reduces core body temperature via vasodilation, which is itself a sleep-onset signal (Bannai & Kawai, Frontiers in Neurology 2012).

4. Muscle relaxation and cramp prevention. Magnesium is the antagonist that lets calcium-triggered contraction reverse. Cramps, twitches, restless legs, eyelid fasciculations, tension headaches: these are typically the first visible signs of insufficiency and the first thing to resolve on supplementation. Supplementation studies in pregnancy, athletes, and statin-induced cramping are consistently positive within 2–3 weeks.

5. Cardiovascular rhythm. Magnesium stabilizes the electrical conduction system of the heart by modulating the inward-rectifier potassium current and the L-type calcium channel. Atrial fibrillation incidence increases with low intracellular magnesium (Khan et al., American Heart Journal 2013), and many palpitations and benign ectopic beats settle when intracellular Mg normalizes. This is well-established cardiology, not theory.

6. Insulin sensitivity. Magnesium is required for the insulin receptor's tyrosine kinase to phosphorylate IRS-1 (Kostov, International Journal of Molecular Sciences 2019). Insufficiency is a modifiable contributor to the insulin-resistance pattern that drives metabolic aging and is one of the reasons berberine and magnesium pair logically in glucose-control protocols.

7. Vitamin D activation. Inactive 25-OH-Vitamin D is converted to the active 1,25-(OH)₂D hormone by the kidney CYP27B1 enzyme, which is magnesium-dependent. High-dose Vitamin D taken without sufficient magnesium can produce flat 25-OH-D blood levels (the substrate is there, the conversion stalls) and a higher risk of the symptoms many people associate with "Vitamin D toxicity" (which is often actually a magnesium-depletion presentation triggered by the unconverted Vitamin D pool).

8. Anxiety and HPA-axis dampening. Magnesium dampens cortisol release from the adrenal cortex and the sympathetic-nervous-system tone in the hypothalamus. A systematic review (Boyle et al., Nutrients 2017, 18 trials) found modest but consistent reductions in self-reported anxiety scores at 248–500mg/day in people with mild-to-moderate symptoms, with the largest effects in those with concurrent magnesium insufficiency.

Why glycinate, specifically (and why most magnesium products fail)

Magnesium comes in roughly a dozen common forms, and they are not interchangeable. The cheap forms are cheap for a reason. This is the single largest distinction between a magnesium product that works and one that doesn't.

Magnesium oxide (the form in most drugstore tablets, often "500mg of magnesium oxide" on the label and quietly delivering ~20mg of usable magnesium) has bioavailability around 4%. It mostly stays in the gut and pulls water in, which is why it works as a laxative and not much else. If you've taken magnesium and felt nothing except a trip to the bathroom, this is probably what you took. Most cheap multivitamins use this form because it costs almost nothing and lets the label claim "100% RDA magnesium" while delivering a negligible systemic dose.

Magnesium citrate is better absorbed (~25–30%) but still has a dose-dependent laxative effect. Useful for occasional constipation; not what you want for daily systemic supplementation, sleep, or methylation support, because the dose that delivers a useful amount of magnesium also delivers loose stools.

Magnesium glycinate (bisglycinate) chelates the mineral to two glycine molecules. The body absorbs the whole package through amino-acid transporters (the same transporters that absorb dietary protein) rather than through the saturable mineral-absorption channels in the small intestine. The result is absorption approaching 80%, no laxative effect even at 400–600mg, and the glycine itself contributes additional GABA-promoting and sleep-supportive effects. This is the form used in most published sleep, anxiety, and longevity-protocol research.

Magnesium L-threonate has an interesting brain-bioavailability story (it crosses the blood-brain barrier more efficiently than other forms, see Slutsky et al., Neuron 2010) but provides only ~7% elemental magnesium per capsule. A $40 bottle gives you maybe 50mg of actual magnesium per dose, which is well below the systemic threshold most other benefits require. It's a complement to glycinate for memory-targeted use, not a replacement for the daily systemic dose.

Why TRAACS specifically (and what most "bisglycinate" labels hide)

One of the longstanding problems with bisglycinate manufacturing is that the chelate bond is fragile. A poorly-chelated bisglycinate dissociates in stomach acid, releases the glycine, and leaves the magnesium ion behind to behave like ordinary magnesium oxide once it hits the gut. You end up with the price of glycinate and the absorption of oxide. There is no way to tell from a label which is which.

TRAACS® (The Real Amino Acid Chelate System) is Albion Labs' patented chelation process that uses a specific mineral-to-amino-acid ratio and a controlled-pH manufacturing window to produce a chelate that survives gastric pH all the way to the small intestine, where the amino-acid-transporter absorption pathway picks it up. The Albion patents (US 6,710,079; US 7,232,786) and the third-party absorption studies behind them (Schuette et al., JPEN 1994; Coudray et al., Magnesium Research 2005) are the reason TRAACS is the form chosen for most clinical supplementation trials and for the major physician-supervised longevity programs. We use it here for the same reason.

What's actually in the bottle

• Magnesium Bisglycinate Chelate (TRAACS®) — 400mg of elemental magnesium per 2-capsule serving. The number on the label is the elemental dose, not the chelate weight, so the label and the dose match.
• HPMC (vegetable cellulose) capsules, no magnesium stearate, no silicon dioxide, no titanium dioxide, no soy oil, no shellac, no carrageenan.
• Excipient-free. Many bisglycinate products use 30–40% capsule volume for stearates and silicates that improve manufacturing throughput at the cost of dissolution time and absorption. This product does not.
• Non-GMO, gluten-free, soy-free, dairy-free, vegan, manufactured in a U.S. cGMP-certified facility, third-party tested by lot for identity (HPLC), potency, microbial limits (USP <61>/<62>), heavy metals (USP <232>/<233> ICP-MS for arsenic, cadmium, lead, mercury), and pesticide residues.
• 60 capsules per bottle. Default protocol: 2 capsules at night = 30 days per bottle. Split protocol (1 morning + 1 night) = 30 days per bottle. Lower-dose maintenance (1 capsule pre-bed) = 60 days per bottle.

How to take it (four protocols)

Default protocol — 400mg at night, 60–90 minutes before bed. 2 capsules with water (food not required, but tolerated either way). This is the dose used in most sleep and recovery research (Abbasi 2012 used 500mg/day; Held 2002 used 500mg/day in older adults). Effect on sleep onset and quality typically appears within the first 3–7 days; the cardiovascular and metabolic effects build over 4–8 weeks as intracellular magnesium normalizes.

Split protocol — 200mg morning + 200mg evening. 1 capsule with breakfast, 1 capsule before bed. Works well for people stacking with NMN/NAD+ in the morning (magnesium supports the NAMPT-driven NMN→NAD+ conversion and the methylation cycle) and still wanting the sleep benefit at night. Slightly better daily floor for muscle-cramp, restless-leg, and palpitation use cases.

NAD+ stack pairing. If you're already taking NMN 500, NMN 1000, Liposomal NAD+, NAD+ 5-in-1, NAD+ Pure Focus, TMG, or Apigenin, magnesium sits underneath all of them. Take 200mg with the morning NAD+ protocol; the NAMPT enzyme runs more cleanly with adequate magnesium present.

Vitamin D pairing. If you take Vitamin D3 + K2, magnesium is required for the kidney CYP27B1 enzyme to convert it to the active 1,25-(OH)₂D hormone form. High-dose Vitamin D without adequate magnesium often produces flat 25-OH-D blood levels (the body has the substrate but can't process it) and a higher rate of the symptoms commonly mislabeled as "Vitamin D toxicity." Take Vitamin D and magnesium together.

GlyNAC and glutathione pairing. If you're running a Glycine 1500mg + NAC 600mg GlyNAC stack, magnesium glycinate stacks cleanly: the glycine half of the chelate adds to the glutathione-substrate pool, the magnesium half is required for the gamma-glutamyl-cysteine ligase enzyme that performs the rate-limiting step of glutathione synthesis. The pre-bed glycine dose from glycinate (400mg of elemental Mg = roughly 1.6g of glycine, ~half the Sekhar GlyNAC trial dose) provides the sleep-architecture benefit on its own.

Allow 2–3 weeks for steady-state intracellular magnesium levels. Magnesium supplementation is a slow-build, not a switch. The serum magnesium test most labs run (RBC magnesium, or worse, total serum magnesium) is a poor proxy for intracellular levels — it can read normal while you are functionally insufficient.

Week-by-week: what to expect

Days 1–7. The first effect most people notice is sleep onset. Falling asleep faster, fewer middle-of-the-night arousals, waking less often to urinate, more vivid dreams (a slow-wave-sleep marker). Some people notice an immediate reduction in muscle twitches, eyelid fasciculations, and restless-leg sensations on day 1–2.

Weeks 2–4. Cramp resolution is largely complete by week 2. Anxiety floor drops (Boyle 2017 trial timing). HPA-axis dampening shows up as easier-to-recover-from-stress responses. People stacking with NMN often notice the NAD+ benefits become more consistent in this window, as the NAMPT reaction finally has its cofactor floor.

Weeks 4–8. Cardiovascular signal: blood pressure typically drops 2–4 mmHg in people with baseline hypertension and adequate baseline insufficiency (Zhang et al., Hypertension 2016 meta-analysis). Insulin sensitivity improves measurably (HOMA-IR, fasting insulin) in people with metabolic-syndrome features. Bone metabolism markers shift in the bone-positive direction.

Months 2–6. Intracellular magnesium fully normalized. The compound effects of better sleep, lower cortisol, better insulin sensitivity, and better NAD+ chemistry compound on each other. People stacking with Vitamin D3+K2 see the 25-OH-D blood level finally move into the optimal 40–60 ng/mL range that Vitamin D alone could not deliver.

Year 1+. The Fang 2016 BMC Medicine mortality endpoints (cardiovascular, type 2 diabetes, all-cause) are population-level signals. The compounding window is what matters: the Mg-dependent enzymes that protect cardiovascular and metabolic health work better every day they have adequate cofactor.

Stack pairings (and what each does)

• Pure NMN 500mg / NMN 1000mg — NAMPT cofactor (the rate-limiting enzyme of NAD+ biosynthesis is Mg-dependent). Every NMN dose runs cleaner with adequate magnesium present.
• TMG 1000mg — methylation pairing. The SAMe → SAH → homocysteine cycle that processes NAD+ byproducts is Mg-dependent at multiple steps. Magnesium and TMG together close the loop.
• Vitamin D3 5000 IU + K2 MK-7 — required for activation. Vitamin D stack is approximately half-effective without adequate magnesium.
• Glycine 1500mg — additive sleep support and glutathione substrate. The bisglycinate chelate already delivers ~1.6g glycine per 400mg Mg dose; adding free glycine pushes total glycine into the GlyNAC trial range.
• NAC 600mg — completes the GlyNAC pair for glutathione restoration in older adults (Sekhar Baylor RCT design).
• Berberine 500mg — additive insulin-sensitivity effect. Berberine activates AMPK; magnesium supports the insulin receptor's tyrosine kinase. The two run on parallel pathways and stack cleanly.
• CoQ10 400mg — Mg-ATP is what mitochondria actually produce. CoQ10 supports the electron transport chain that generates ATP; magnesium makes the ATP usable.
• Ashwagandha KSM-66 — additive HPA-axis dampening. Ashwagandha lowers cortisol via the limbic pathway; magnesium dampens the adrenal-cortex side. Useful for sleep-onset anxiety.
• Taurine 1000mg — additive cardiovascular rhythm support and additional GABA-receptor activity. Magnesium taurate is a known cardiac niche; the same pairing works with the two compounds taken separately.
• Omega-3 EPA/DHA 2000mg — additive cardiovascular signal and additive anti-inflammatory effect. The Mg + Omega-3 + Vit D triad is the cardiovascular-foundation default.

Who this is for

• Anyone running an NMN, NAD+, or resveratrol protocol — magnesium is the cofactor those compounds need to work properly.
• Anyone taking high-dose Vitamin D who isn't already supplementing magnesium.
• Anyone with sleep-onset latency > 20 minutes, frequent middle-of-night awakenings, or low-grade morning anxiety.
• Anyone with muscle cramps, restless legs, eyelid twitches, tension headaches, or post-workout cramping.
• Anyone over 50 (intracellular magnesium drops with age, kidney loss increases, soft-tissue cramps and atrial-fibrillation risk both rise).
• Anyone on diuretics, PPIs (Prilosec, Nexium, Protonix), metformin, or chronic alcohol use — these all increase renal magnesium loss.
• Anyone with elevated baseline anxiety, mild-to-moderate depression, or stress-driven cortisol patterns.
• Athletes and weight-trainers — additive recovery effect and reduced post-workout cramping.

Who this is NOT for

• Severe kidney disease (eGFR < 30). The kidneys excrete excess magnesium; impaired kidneys can let it accumulate to clinically dangerous levels (hypermagnesemia). Talk to your nephrologist before supplementing at any dose.
• Active hypermagnesemia or magnesium-toxicity history. Same logic.
• Myasthenia gravis. Magnesium can exacerbate neuromuscular weakness in this condition.
• Severe bradycardia or symptomatic AV block. Discuss with your cardiologist — magnesium slightly slows AV nodal conduction.
• Chronic abdominal use of bisphosphonates, tetracyclines, or quinolones without separating dose timing — see interactions below.
• Anyone seeking an immediate stimulant effect. Magnesium is calming and foundational, not energizing. If you're looking for next-day energy, this isn't it; it's the floor that lets the rest of the stack work.

Drug interactions (what to separate, what to coordinate)

• Tetracyclines (doxycycline) and fluoroquinolones (ciprofloxacin, levofloxacin): magnesium can chelate these antibiotics in the gut and reduce their absorption. Separate doses by 2 hours either side.
• Bisphosphonates (Fosamax/alendronate, Boniva/ibandronate, etc.): same binding issue. Separate by 2 hours.
• Levothyroxine (Synthroid) and other thyroid replacement: separate by 4 hours to avoid reduced absorption.
• Diuretics (furosemide, hydrochlorothiazide): these increase renal magnesium loss. Supplementation is often more important for people on these drugs, but coordinate with the prescribing physician for dose-monitoring.
• PPIs (omeprazole, esomeprazole, pantoprazole): chronic PPI use depletes magnesium. The FDA issued a public-health advisory in 2011 specifically about hypomagnesemia from long-term PPI use. Supplementation is typically warranted but should be coordinated.
• Metformin: increases urinary magnesium loss; type 2 diabetics on metformin frequently run subclinical magnesium insufficiency that magnesium glycinate corrects.
• Digoxin: hypomagnesemia potentiates digoxin toxicity; magnesium normalization is desirable but the timing should be coordinated with cardiology.
• Pregnancy and breastfeeding: magnesium glycinate is generally considered safe at standard doses (and is sometimes prescribed for leg cramps, sleep, and pre-eclampsia prevention) but check with your OB/GYN before starting.

The most common side effect even at full dose is loose stools, which is much less common with TRAACS bisglycinate than with citrate, oxide, or sulfate, but still possible if you are sensitive. If it happens, drop to 200mg and increase only if tolerated.

FAQ

I take a multivitamin that has magnesium — do I need this? Most multivitamins contain 50–100mg of magnesium oxide, which absorbs at ~4%, delivering 2–4mg of usable magnesium per dose. The RDA is 320mg (women) to 420mg (men). A multivitamin alone gets you almost nothing of what your body needs, even before considering increased loss from caffeine, alcohol, stress, exercise, and the medications above.

Glycinate vs. L-threonate vs. citrate vs. taurate — which is "best"? They have different specialties. Glycinate (TRAACS bisglycinate) is the daily-driver form for systemic supplementation, sleep, NAD+/methylation support, anxiety, and cramps — the highest absorption with the lowest GI burden and the meaningful elemental dose. L-threonate is brain-targeted but provides only ~7% elemental magnesium, so it's a complement rather than a replacement. Citrate is for occasional constipation. Taurate is sometimes used specifically for cardiovascular niche cases. Malate is sometimes used for daytime energy in fibromyalgia protocols. For someone taking a single magnesium product, glycinate is the right default.

Will this make me drowsy during the day? Magnesium is calming, not sedating. The split protocol (200mg AM, 200mg PM) is well-tolerated by most people without daytime drowsiness — glycinate's calming effect is more "removes the anxiety floor" than "adds sleepiness." If you find a morning dose dulls you, take the full 400mg at night.

Can I just eat more pumpkin seeds and dark chocolate? The richest food sources (pumpkin seeds, almonds, cashews, dark leafy greens, dark chocolate, black beans, avocado) contain 50–150mg per serving — but modern soils are magnesium-depleted (decades of synthetic-fertilizer use without remineralization), food processing strips most of it out, and the absorption from food is around 30–40%. Even a near-perfect diet often only delivers 250–300mg/day, which is below the RDA. Supplementation closes the gap; it doesn't replace the diet.

How long until I feel something? Sleep effects: usually within 3–7 days for people with baseline insufficiency. Cramp/twitch reduction: 1–2 weeks. Cardiovascular and metabolic effects: 4–8 weeks. Anxiety effects: 2–4 weeks at consistent dosing. The compound is foundational — it's not a stimulant, you won't feel it the day you take it the way you'd feel caffeine.

Does it interact with the longevity stack? No negative interactions with NMN, NAD+ products, Resveratrol, Spermidine, Fisetin, Quercetin, TMG, Apigenin, Curcumin, Urolithin A, PQQ, CoQ10, Astaxanthin, or any of the collagens. Positive synergy with NMN/NAD+ (NAMPT cofactor), with Vitamin D (CYP27B1 cofactor for activation), with TMG (methylation cycle support), and with Glycine/NAC (GlyNAC and glutathione-substrate pathway).

Is "TRAACS" different from regular bisglycinate? TRAACS is Albion Labs' patented chelation process; the patents (US 6,710,079 and US 7,232,786) describe a specific pH-controlled ratio and processing step that produces a chelate that survives gastric acid intact. Generic "bisglycinate" without TRAACS or another verified chelation patent often dissociates in the stomach and absorbs more like magnesium oxide than like the bisglycinate the label implies. Schuette et al. (JPEN 1994) and Coudray et al. (Magnesium Research 2005) are the foundational human-absorption studies; both used the patented chelate.

What about magnesium "buffered" with magnesium oxide to hit a higher dose? Many cheaper bisglycinate labels do this. The label might read "magnesium bisglycinate (and oxide)" or just "magnesium" with the form unspecified. The buffered version blends 30–50% magnesium oxide into the chelate to lower the production cost; you end up paying for bisglycinate and getting a partial dose of oxide. Read the label closely. This product is 100% TRAACS bisglycinate, no oxide buffering.

Can I take it with NMN or NAD+ first thing in the morning? Yes, and it's the recommended pairing — magnesium is the cofactor for the NAMPT enzyme that converts NMN into NAD+. The morning dose (200mg from the split protocol) is the right pairing window. The evening dose remains for sleep architecture.

Why 400mg and not the higher doses some products advertise? 400mg of elemental magnesium per day is the dose that hits the cardiovascular, metabolic, and sleep endpoints in most published trials (Boyle 2017; Abbasi 2012; Zhang 2016). Higher doses don't add benefit and increase the risk of GI side effects. The published RDAs are 320mg (women) and 420mg (men); 400mg from supplementation plus 200–300mg from a typical diet covers the upper end without overshooting.

Can I open the capsule and mix the powder into a drink? Yes. Magnesium bisglycinate has a slightly bitter-saline taste that mixes acceptably into a smoothie, electrolyte drink, or tart citrus beverage. The chelate is heat-stable up to 60°C, so it's fine in cold or warm drinks but not in hot tea or coffee.

Do I need to cycle off? No. Magnesium is a foundational mineral, not a hormetic compound. You don't develop tolerance and there's no benefit to cycling. The kidneys regulate magnesium tightly; excess is excreted. Continuous use is the default protocol.

Can children take it? Standard pediatric dosing is age- and weight-dependent (typically 80mg/day for ages 1–3, 130mg/day for 4–8, 240mg/day for 9–13). Don't dose pediatric magnesium from an adult product; talk to your child's pediatrician about an age-appropriate formulation.

What lab test should I run if I want to track this? Standard "magnesium" on a blood panel measures total serum magnesium, which is a poor proxy for intracellular magnesium and can read normal while you're functionally insufficient. The better tests are RBC magnesium (red-blood-cell magnesium, available through Quest, LabCorp, and most direct-to-consumer panels) and magnesium loading tests (rarely run outside research). RBC magnesium responds to supplementation over weeks-to-months and is the test the longevity-medicine community uses to track this.

The science (selected references)

• Fang X. et al. BMC Medicine, 2016. "Dietary magnesium intake and the risk of cardiovascular disease, type 2 diabetes, and all-cause mortality: a dose-response meta-analysis of prospective cohort studies." Pooled analysis of 40 studies, n > 1,000,000. 22% lower all-cause mortality per 100mg/day.
• Burgos E.S. & Schramm V.L. Biochemistry, 2008. "Weak coupling of ATP hydrolysis to the chemical equilibrium of human nicotinamide phosphoribosyltransferase." Establishes NAMPT as a Mg²⁺-dependent enzyme.
• Uwitonze A.M. & Razzaque M.S. Journal of the American Osteopathic Association, 2018. "Role of Magnesium in Vitamin D Activation and Function." Mechanism review of the CYP27B1 / 25-OH-D → 1,25-(OH)₂D activation step.
• Abbasi B. et al. Journal of Research in Medical Sciences, 2012. "The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial." 500mg/day, 8 weeks. Improved sleep onset, sleep efficiency, serum cortisol.
• Held K. et al. Pharmacopsychiatry, 2002. "Oral Mg(2+) supplementation reverses age-related neuroendocrine and sleep EEG changes in humans." 500mg/day, 20 days. EEG-confirmed improvements in slow-wave sleep architecture.
• Boyle N.B. et al. Nutrients, 2017. "The Effects of Magnesium Supplementation on Subjective Anxiety and Stress — A Systematic Review." 18 trials, doses 248–500mg/day. Modest but consistent anxiolytic effect.
• Zhang X. et al. Hypertension, 2016. "Effects of Magnesium Supplementation on Blood Pressure: A Meta-Analysis of Randomized Double-Blind Placebo-Controlled Trials." 34 trials, n = 2,028. 2.00 mmHg systolic / 1.78 mmHg diastolic reduction overall, larger in baseline-insufficient subgroups.
• Khan A.M. et al. American Heart Journal, 2013. "Low serum magnesium and the development of atrial fibrillation in the community: the Framingham Heart Study." Low serum Mg associated with 50% higher AF incidence over 20-year follow-up.
• Kostov K. International Journal of Molecular Sciences, 2019. "Effects of Magnesium Deficiency on Mechanisms of Insulin Resistance in Type 2 Diabetes: Focusing on the Processes of Insulin Secretion and Signaling." Mechanism review of the insulin-receptor / IRS-1 phosphorylation step.
• Slutsky I. et al. Neuron, 2010. "Enhancement of learning and memory by elevating brain magnesium." Magnesium L-threonate / brain-bioavailability mechanism paper.
• Bannai M. & Kawai N. Frontiers in Neurology, 2012. "New therapeutic strategy for amino acid medicine: glycine improves the quality of sleep." Mechanism for the glycine half of the bisglycinate chelate.
• Schuette S.A. et al. JPEN, 1994. "Bioavailability of magnesium diglycinate vs magnesium oxide in patients with ileal resection." Foundational human absorption study for the patented chelate.
• Coudray C. et al. Magnesium Research, 2005. "Study of magnesium bioavailability from ten organic and inorganic Mg salts in Mg-depleted rats using a stable isotope approach." Cross-form absorption comparison.
• Rosanoff A. et al. Nutrition Reviews, 2012. "Suboptimal magnesium status in the United States: are the health consequences underestimated?" The "two-thirds of US adults below RDA" reference.

Quality and disclaimer

Manufactured in a U.S. cGMP-certified facility. Third-party tested by lot for identity (HPLC), potency, microbial limits (USP <61>/<62>), heavy metals (USP <232>/<233> ICP-MS for arsenic, cadmium, lead, mercury), pesticide residues, and PAHs. Capsules are HPMC vegetable-cellulose; no magnesium stearate, silicon dioxide, or titanium dioxide. Non-GMO, gluten-free, soy-free, dairy-free, vegan.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult a healthcare provider before starting any supplement, especially if you have kidney disease, take prescription medication, or are pregnant or breastfeeding.