Top 10 Best Magnesium for Sleep (2026)
01 · Best overall✓ Label verified · Supplement Facts read Sep 7, 2026Best overall: Doctor's Best High Absorption Magnesium Glycinate Lysinate
TRAACS chelate, 200 mg elemental Mg per 2-tab serving, $18/month — the safe default if you're buying your first sleep-focused magnesium bottle.
$18 / month$0.15 / 200 mg elemental serving
Why it wins: all five scores, pros & cons, full label
- TRAACS chelate is the most clinically-tested branded glycinate on the market
- 200 mg elemental dose lands inside the sleep-trial window (Abbasi 2012 used 500 mg, ramp from 200)
- 240-tablet bottle is the lowest cost-per-serving at the trusted-brand tier
- Non-GMO, gluten-free, vegan — clean label without clinician-brand markup
- Tablets (not capsules) — slightly slower onset for the most-sensitive buyers
- Contains lysinate alongside glycinate — pure-glycinate purists prefer Pure Encapsulations
- Per serving
- 200 mg elemental Mg (2 tabs)
- Bottle
- 240 tablets (~4 months at 200 mg/day)
- Testing
- TRAACS patented chelate + public batch tests
- Form
- Bisglycinate / lysinate chelate (TRAACS)
Our take — The default first-time pick. You get the TRAACS-patent chelate (most-studied in the consumer market), a 200 mg elemental serving that maps cleanly onto the trial window, and a price that doesn't make you flinch. The lysinate co-chelate is the only real differentiator from purer-label brands — and it's not a downside, just a flavour distinction. If you've never bought magnesium glycinate before, start here.
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10Who Wins Which Aspect
Sorted by overall SAC Product Score™ — the official ranking.
| # | Pick | Score | Form bioavailability30% | Elemental Mg per serving25% | Lab transparency20% | Cost per active mg15% | Real-world response10% | Cost Per Dose | Buy |
|---|---|---|---|---|---|---|---|---|---|
| 01 | | 9.0 | 9.02 | 9.51 | 8.5 | 9.51 | 8.52 | $0.15 / 200 mg elemental serving | Check price |
| TRAACS chelate is the most clinically-tested branded glycinate on the marketTablets (not capsules) — slightly slower onset for the most-sensitive buyers | |||||||||
| 02 | | 8.9 | 9.51 | 8.53 | 9.81 | 7.53 | 8.52 | — | Check price |
| Hypoallergenic label — no fillers, dyes, gluten, dairy, GMOs, or unnecessary excipientsMost expensive on the list at $32/month | |||||||||
| 03 | | 8.8 | 9.51 | 8.53 | 9.81 | 6.5 | 9.01 | ~$1.17 / 3-cap serving | Check price |
| NSF Certified for Sport — the federation-grade testing standardHighest cost per serving on the list (~$1.17) | |||||||||
| 04 | | 8.7 | 9.02 | 9.02 | 9.52 | 7.0 | 8.52 | $0.50 / 200 mg elemental scoop | Check price |
| NSF Certified for Sport — the highest third-party testing standard, used by MLB / NFL / NHL teamsHigher per-mg cost than capsule-based picks | |||||||||
| 05 | | 8.5 | 8.53 | 9.02 | 7.5 | 9.51 | 8.03 | ~$0.06 / 100 mg elemental | Check price |
| Cheapest pick with a verified bisglycinate chelate — most $9 budget bottles are oxide in disguiseNo USP / NSF certification — only GMP-facility + third-party | |||||||||
| 06 | | 8.5 | 9.51 | 7.0 | 9.03 | 8.02 | 9.01 | $1.17 / 2000 mg Magtein serving | Check price |
| Only magnesium form documented to raise CSF magnesium and support working memoryLower elemental Mg per dose than glycinate (~144 mg vs ~200 mg) | |||||||||
| 07 | | 8.1 | 8.53 | 8.53 | 8.0 | 7.0 | 8.03 | ~$0.37 / 200 mg elemental serving | Check price |
| Small-brand QC obsession — every batch publicly testedHigher cost than Doctor's Best for similar formulation | |||||||||
| 08 | | 8.0 | 8.0 | 8.0 | 8.5 | 7.53 | 8.03 | $0.18 / 200 mg elemental serving | Check price |
| NOW's in-house QC is among the most consistent in the industry — 30+ yearsTablet format slightly less bioavailable than capsules | |||||||||
| 09 | | 7.7 | 8.53 | 9.02 | 5.5 | 7.0 | 8.03 | $0.67 | Check price |
| 275 mg of elemental magnesium per serving, stated on the panelNo third-party certificate or published lab report | |||||||||
| 10 | | 7.5 | 6.5 | 8.53 | 7.5 | 7.53 | 8.03 | — | Check price |
| The most-purchased magnesium product in America — strong brand familiarityMostly citrate — the label lists ionic citrate and ionic glycinate under one 325 mg total, with no split; expect citrate-like ~30% bioavailability, not ~80%, and some water pulled into the gut | |||||||||
The Other 9, Ranked
- 02
Best premium: Pure Encapsulations Magnesium (Glycinate)
8.9SAC Score™Clinician-grade hypoallergenic label, USP-grade glycinate, fully titratable. The cleanest magnesium money can buy.
StrongestLab transparency9.81WeakestCost per active mg7.5- Per cap
- 120 mg elemental Mg
- Bottle
- 90 capsules · 90 servings (1 cap each)
- Testing
- USP-grade, hypoallergenic, third-party verified
All five scores, pros & cons, full label
What We Like- Hypoallergenic label — no fillers, dyes, gluten, dairy, GMOs, or unnecessary excipients
- USP-grade pharmaceutical magnesium glycinate raw material
- Per-cap dose titratable from 120-360 mg elemental, fits any goal
- Clinician-preferred brand — used by integrative medicine practices for 30+ years
What You Live With- Most expensive on the list at $32/month
- Premium pricing is partly clinician-brand markup, not pure formulation cost
- Form
- Magnesium glycinate (USP-grade)
Our take — If you have a sensitive gut, allergen concerns, or just want the cleanest label on the planet, this is it. The USP-grade chelate and zero-excipient formulation are what every clinician brand promises and Pure Encapsulations actually delivers. The downside is price — at $32/month it's 2.5x the budget pick. Worth it if you're chemically sensitive or want absolute label transparency.
- 03
Best threonate for sleep: Momentous Magnesium L-Threonate (Magtein)
8.8SAC Score™Magtein magnesium L-threonate, the form designed to raise magnesium in the brain. For people whose problem is a busy head at night rather than tense muscles.
StrongestLab transparency9.81WeakestCost per active mg6.5- Per serving
- 2000 mg Magtein = 145 mg elemental Mg (3 capsules)
- Active form
- Magnesium L-Threonate (licensed Magtein)
- Bottle / supply
- 90 caps = 30-day supply at 3 caps/day
All five scores, pros & cons, full label
What We Like- NSF Certified for Sport — the federation-grade testing standard
- Licensed Magtein at the full trial dose
- Athlete-grade sourcing and QC; trusted in pro-sports circles
- Same brain effect as Neuro-Mag (#6) with banned-substance certification layered on
What You Live With- Highest cost per serving on the list (~$1.17)
- You're paying for certification, not a better cognitive effect
- Testing
- NSF Certified for Sport — banned-substance tested
Our take — If you're drug-tested, this is the answer. NSF Certified for Sport means every batch is screened against banned substances — a level of assurance recreational users don't need but every federation athlete does. The Magtein and the trial dose are identical to Neuro-Mag (#6); the premium buys the certification, not extra brain magnesium. Worth it if your sport requires it; if you're not tested, Neuro-Mag (#6) delivers the same dose for less.
- 04
Best for athletes: Thorne Magnesium Bisglycinate
8.7SAC Score™NSF Certified for Sport — the gold standard for tested-athlete supplementation. Drink-mix format for fast post-training delivery.
StrongestLab transparency9.52WeakestCost per active mg7.0- Per serving
- 200 mg elemental Mg per scoop
- Bottle
- 60 servings
- Testing
- NSF Certified for Sport — banned-substance screened
All five scores, pros & cons, full label
What We Like- NSF Certified for Sport — the highest third-party testing standard, used by MLB / NFL / NHL teams
- Drink-mix format absorbs faster than capsules — useful post-training
- Clinician-trusted brand with 35+ years of QC reputation
- 200 mg elemental serving matches the trial window exactly
What You Live With- Higher per-mg cost than capsule-based picks
- Drink-mix taste is mineral-forward — not all users love it
- Form
- Magnesium bisglycinate (drink mix)
Our take — If you're a tested athlete (NCAA, pro league, anti-doping protocol) or just want the absolute strongest third-party testing assurance, Thorne is the answer. NSF Certified for Sport is the strictest consumer-supplement standard in existence. For non-athletes the certification is overkill — but the formulation itself is best-in-class regardless.
- 05
Best budget: Nutricost Magnesium Glycinate
8.5SAC Score™The cheapest real bisglycinate chelate on Amazon. ~$0.06 per 100 mg elemental, GMP-tested supply chain.
StrongestCost per active mg9.51WeakestLab transparency7.5- Per serving
- 210 mg elemental Mg (3 caps)
- Bottle
- 180 capsules (60 servings, ~2 months)
- Testing
- GMP-certified facility, third-party tested
All five scores, pros & cons, full label
What We Like- Cheapest pick with a verified bisglycinate chelate — most $9 budget bottles are oxide in disguise
- Sold in 90 / 180 / 360 counts — stock up without re-ordering
- Per-serving dose still lands inside the sleep-trial window
- Vegetarian (hypromellose) capsules; excipients are stearic acid, a rice-extract blend and magnesium stearate
What You Live With- No USP / NSF certification — only GMP-facility + third-party
- Larger capsule size than premium brands
- Form
- Magnesium bisglycinate chelate
Our take — If you want to test glycinate without committing $30+/month, Nutricost is the right starting point. The supply chain is real, the dose is real, the chelate is real. You're trading USP-grade label theatrics for 60% lower cost. Run one 3-cap serving (210 mg) PM for 2 weeks — if you respond, upgrade to Doctor's Best (#1) or Pure Encapsulations (#2) on cycle two.
- 06
Best for cognition + sleep: Life Extension Neuro-Mag Magnesium L-Threonate
8.5SAC Score™The only magnesium that meaningfully crosses the blood-brain barrier. Magtein patent at the trial dose. AM cognition + PM sleep stack.
StrongestForm bioavailability9.51WeakestElemental Mg per serving7.0- Per serving
- 2000 mg Magtein = ~144 mg elemental Mg
- Bottle
- 90 capsules (30-day supply at full dose)
- Testing
- Magtein supplier COA + Life Extension QC
All five scores, pros & cons, full label
What We Like- Only magnesium form documented to raise CSF magnesium and support working memory
- Magtein is the original patented L-Threonate — the form used in published trials
- Stacks cleanly with glycinate PM (threonate AM, glycinate PM is the standard stack)
- Life Extension's QC pedigree is among the strongest in the supplement industry
What You Live With- Lower elemental Mg per dose than glycinate (~144 mg vs ~200 mg)
- Most expensive form per active mg on the market
- Mildly alerting — never take this at night
- Form
- Magnesium L-Threonate (Magtein, patented)
Our take — L-Threonate is the cognition form, not the sleep form. Run this only if working memory and daytime focus are your specific complaints. The standard protocol is Magtein AM (Pick #6) + glycinate PM (Pick #1, #4 or #5) — together they cover the full magnesium spectrum: brain during the day, body at night. If sleep is your only goal, skip this and save $20/month.
- 07
Best small-brand premium: Nested Naturals Magnesium Glycinate
8.1SAC Score™A genuine Albion TRAACS chelate — honestly disclosed as buffered with oxide. Vegan capsules, third-party tested, clean label.
StrongestForm bioavailability8.53WeakestCost per active mg7.0- Per serving
- 200 mg elemental Mg (2 caps)
- Bottle
- 120 vegan capsules (60 servings)
- Testing
- Third-party tested, vegan-certified
All five scores, pros & cons, full label
What We Like- Small-brand QC obsession — every batch publicly tested
- 100% vegan capsules and ingredients
- Clean label with no unnecessary fillers
- Strong customer-service reputation for batch-specific inquiries
What You Live With- Higher cost than Doctor's Best for similar formulation
- Smaller production runs mean occasional out-of-stock periods
- Form
- Magnesium bisglycinate chelate
Our take — If you prefer to buy from a smaller, more transparent brand and don't mind paying $6/month extra over Doctor's Best, Nested Naturals delivers a genuine Albion TRAACS chelate with stronger publicly-shared testing — though honestly labeled as buffered, so part of each dose is oxide. You're paying for brand values and transparency; if pure unbuffered chelate is the point, stay with the unbuffered picks above.
- 08
Best from a household brand: NOW Foods Magnesium Glycinate
8.0SAC Score™Household-name brand with three decades of QC. The safe-default backup pick when your primary is out of stock.
StrongestLab transparency8.5WeakestCost per active mg7.5- Per serving
- 200 mg elemental Mg (2 tabs)
- Bottle
- 180 tablets
- Testing
- NOW in-house labs, GMP, NSF-registered facility
All five scores, pros & cons, full label
What We Like- NOW's in-house QC is among the most consistent in the industry — 30+ years
- Available in most US health stores — easy offline backup
- Kosher, non-GMO certified
- Lowest-priced option at the trusted-household-brand tier
What You Live With- Tablet format slightly less bioavailable than capsules
- Brand identity less premium than Doctor's Best for the same formulation
- Form
- Magnesium bisglycinate
Our take — If you want to walk into a Sprouts or Vitamin Shoppe and grab a bottle of something you trust, NOW Foods is the answer. The QC pedigree justifies the small premium over Nutricost. Slot it in as a backup when your primary brand is out of stock — or as a default for buyers who value brand familiarity over optimisation.
- 09
Our own brand: Super Achiever Magnesium Glycinate
7.7SAC Score™Our own glycinate: 275 mg of elemental magnesium per serving, printed on the panel, for $20 a month. It ranks here because it has no lab report or chelate trademark to show.
StrongestElemental Mg per serving9.02WeakestLab transparency5.5- Per serving
- 275 mg elemental magnesium from 2,500 mg glycinate, 3 capsules
- Cost per serving
- $0.67
- Bottle
- 90 capsules · 30 servings
All five scores, pros & cons, full label
What We Like- 275 mg of elemental magnesium per serving, stated on the panel
- Glycinate form; the 275 mg from 2,500 mg ratio fits an unbuffered chelate
- $20 for a month at the label dose
What You Live With- No third-party certificate or published lab report
- No chelate trademark (TRAACS or Albion) on the label
- Form
- Magnesium glycinate, no chelate trademark
- Certifications
- None on the label
Our take — Form and dose are right and the label is clear about both. The bottles above it can prove their chelate or their testing; this one cannot yet.
- 10
Best citrate (relaxation, not sleep): Natural Vitality CALM Magnesium Citrate
7.5SAC Score™The household-name calming drink. Mostly citrate, not pure glycinate — but it's the most popular magnesium product in America for a reason.
StrongestElemental Mg per serving8.53WeakestForm bioavailability6.5- Per serving
- 325 mg elemental Mg per 4 g serving
- Bottle
- 16 oz canister (113 servings)
- Testing
- GMP, batch-tested; Non-GMO and vegan seals on the label
All five scores, pros & cons, full label
What We Like- The most-purchased magnesium product in America — strong brand familiarity
- Drink-mix format works for capsule-averse buyers
- Citrate is genuinely calming for some users (citrate has weak GABA-A modulation)
- Pleasant raspberry-lemon flavour
What You Live With- Mostly citrate — the label lists ionic citrate and ionic glycinate under one 325 mg total, with no split; expect citrate-like ~30% bioavailability, not ~80%, and some water pulled into the gut
- Loose-stool risk at >400 mg/day
- Glycinate outperforms it on every sleep-relevant metric in head-to-head studies
- Form
- Magnesium citrate + glycinate (listed as ionic forms, formed when mixed with water)
Our take — This is a relaxation drink, not a sleep solution. The CALM brand is wildly popular and many users genuinely enjoy the ritual of a calming evening drink — that's worth something. But if your goal is to fall asleep faster and sleep deeper, any of the glycinate picks (#1, #2, #4, #5, #7, #8) will outperform citrate on the actual outcomes. Buy this if the drink ritual matters more than the absorption math.
Magnesium In Four Short Lessons
Why form bioavailability is the entire game
- ~4%
- Bioavailability of magnesium oxide vs ~80% for chelated forms
- −17 min
- Sleep onset reduction at 500 mg Mg / day in Abbasi 2012
- +13%
- Total sleep time gain on supplemental Mg in pooled meta-analysis
- 75%
- US adults below the magnesium RDA (310-420 mg / day)
Sources: Held 2002 (PMID 12163983); Abbasi 2012 insomnia RCT (PMID 23853635); Wienecke 2016 chelate vs oxide (PMID 27933574); Mah & Pitre 2021 meta-analysis (PMID 33865376).
Check the form on the label: avoid oxide.
Around 70% of consumer magnesium bottles are oxide, with roughly 4% bioavailability. A 500 mg oxide pill delivers about 20 mg of usable magnesium.
Buy glycinate for sleep.
Glycinate is chelated to glycine and roughly 80% bioavailable. L-threonate is the cognition form, not the sleep form.
Read the elemental magnesium per serving.
Compare that number, not the compound weight, against the trial dose; 500 mg a day improved primary insomnia in Abbasi 2012.
Sleep-dose claims trace to Abbasi 2012 (PMID 23853635) and the Mah & Pitre 2021 meta-analysis (PMID 33865376); full scoring in the methodology below.
Each pick was scored 0-10 across five criteria, then weighted to a final composite. Form bioavailability carries the most weight because it directly determines whether the milligrams on the label become usable magnesium in your bloodstream. Elemental Mg per serving and trial-dose alignment together ensure you can actually hit a clinical dose without swallowing six capsules. Third-party testing acts as a fraud filter — chelate quality varies wildly at the budget tier. Price per active mg is the final tie-breaker.
Form bioavailability · 30%
Glycinate / bisglycinate / L-threonate get +3 base. Citrate +1. Malate / taurate +1. Oxide / sulfate / 'magnesium' unspecified: -3. The form decides everything — if you fail this criterion you fail the bottle.
Elemental Mg per serving · 20%
The supplement facts panel must declare elemental Mg, not just compound mg. Picks delivering 100-200 mg elemental per serving inside the trial window score full marks; mega-doses (>400 mg) get penalised for grogginess risk.
Third-party testing · 20%
Public COA, USP / NSF / ConsumerLab certification, or only GMP-facility manufacturing. Patented chelates (TRAACS, Magtein) get a half-point credit for supplier-level testing on top of brand QC.
Trial-dose alignment · 15%
Per-serving dose lands inside the 200-400 mg/day elemental window for sleep trials (or the 1500-2000 mg Magtein window for cognition). Single-cap dosing scores higher than 4-cap protocols for adherence.
Price per active mg · 15%
Monthly cost divided by elemental Mg per day at the recommended dose. Tiebreaker — the first four criteria do most of the ranking.
How magnesium glycinate calms your nervous system
- 1
Glycine chelation survives stomach acid
Two glycine molecules clamp around Mg2+, shielding the ion from gastric pH and hydrolysis. The compound enters the small intestine intact — oxide can't do this.
- 2
Plasma uptake + glycine co-action
Within 90 minutes plasma Mg rises. The glycine carrier doubles as an inhibitory neurotransmitter at its own glycine receptors in the brainstem — independent of magnesium's action.
- 3
GABA-A potentiation + NMDA dampening
Magnesium binds GABA-A receptors (parasympathetic shift) and physically blocks NMDA channels (reducing excitatory glutamate flow). Cortisol drops, melatonin synthesis ramps, sleep latency shortens.
What to expect on a 6-week magnesium protocol
Sleep onset shortens
First measurable change. Fall asleep 5-15 minutes faster. Subjective 'mind quieter' at lights-out.
Sleep depth stabilises
Wearable-measured deep sleep extends 5-12 minutes per night. Morning resting heart rate drops 2-4 bpm. Re-evaluate dose here.
REM increases + HRV climbs
REM extends, HRV stabilises 5-15% higher than baseline. Anxiety scores drop on validated scales. Cramps fully resolved if present.
The bottom line
For your first magnesium, buy Doctor's Best (#1).
It is the safe default for a first-time sleep buyer at a normal budget: a TRAACS chelate delivering 200 mg elemental per serving, with public batch testing, at $18 a month. The 200 mg dose maps cleanly onto the clinical trial window.
The rest of the podium is need-specific, not better or worse.
Nutricost (#5) is the real chelate for a tight budget at $12. Pure Encapsulations (#2) is for a sensitive gut or a clinician-grade label at $32. If working memory is your specific complaint, jump to Life Extension Neuro-Mag (#6) — L-threonate, not glycinate. A busy head at night: Momentous (#3), also Magtein threonate.
Before you buy, read the supplement facts panel.
The single biggest mistake in this category is buying oxide. Check that the named form is glycinate or L-threonate, and verify the elemental Mg per serving — not the compound mg on the front of the bottle.
Quick Answers
Is magnesium glycinate really that much better than oxide?
Yes — by a factor of ~20x. The Wienecke 2016 chelate-vs-oxide AUC study and a decade of follow-up work show chelated glycinate clears the gut wall intact and lands in plasma; oxide hydrolyses, drags water into the lumen, and exits as loose stool. A 500 mg oxide pill delivers ~20 mg of usable elemental Mg. A 200 mg elemental glycinate dose delivers 80-130 mg. If you've been on oxide and felt nothing, that's why.
How is L-Threonate different from glycinate?
L-Threonate (the patented Magtein form) is the only magnesium that meaningfully raises CSF magnesium — i.e., it crosses the blood-brain barrier. Slutsky 2010 (rodent) and human follow-ups show working-memory and cognition effects glycinate doesn't produce. The trade-off: elemental Mg per dose is lower than glycinate, cost is 3-4x, and it's mildly alerting. Use it AM for cognition, not at night for sleep. Most readers should run glycinate first; add threonate only if brain fog is the specific complaint.
How much should I actually spend per month?
$12-22 is the productive range for glycinate. Below $10 you usually lose either real chelation (re-labelled oxide) or third-party testing. Above $30 you start paying for clinician-brand markup — Pure Encapsulations and Thorne are justified for sensitive populations, but Doctor's Best and Nutricost cover 90% of buyers. L-Threonate is its own pricing universe ($30-55/month) and only worth it for the cognition use case.
Will it cause diarrhea?
Glycinate almost never does — that's part of why it's the sleep form. Citrate, oxide, and sulfate routinely do at any reasonable dose. If you feel GI distress on glycinate, you're either over 600 mg/day or you bought a 'magnesium complex' that's mostly oxide with a glycinate sprinkle. Read the supplement facts panel — it must declare the elemental Mg amount from each named form.
Can I take it with calcium or zinc?
Not at the same dose. Magnesium, calcium, and zinc compete for absorption transporters. Take calcium with breakfast, magnesium 12 hours later (with dinner or before bed), and zinc on a separate day or 4+ hours apart. If you're stacking all three, the simplest split is calcium AM, zinc midday with food, magnesium PM.
How long until I notice anything?
Sleep onset responds first, at 3-5 nights. Sleep depth and morning resting heart rate stabilise by week 2. REM extension and HRV gains compound through weeks 4-6. If sleep hasn't shifted at all by week 4 on a real chelate at 200-400 mg elemental, you're either a non-responder or your sleep problem isn't magnesium-deficient. Try L-Theanine + Glycine before adding more magnesium.
Are there side effects I should watch for?
At 200-400 mg/day elemental glycinate: rare loose stool at the top of the range, occasional vivid dreams (sometimes welcomed, sometimes not), very rare next-day grogginess at the high end. Avoid or consult a doctor if you have kidney disease (Mg clearance impaired), are on certain antibiotics or bisphosphonates (binding interactions), or are pregnant/nursing without supervision. L-Threonate at 1.5-2 g/day has a clean safety profile in published trials.
Every Claim Ranked Above Traces Back To One Of These
6 peer-reviewed sources, each linked to PubMed
- [1] Held 2002 PMID 12163983 — Oral Mg(2+) supplementation reverses age-related neuroendocrine and sleep EEG changes in humans. Oral magnesium supplementation in elderly subjects normalised sleep EEG patterns and the age-related decline in slow-wave sleep, plus shifted the cortisol curve back toward youthful patterns. Foundational evidence that supplemental Mg directly modifies sleep architecture.
- [2] Abbasi 2012 PMID 23853635 — The effect of magnesium supplementation on primary insomnia in elderly: a double-blind placebo-controlled clinical trial. 500 mg/day magnesium for 8 weeks in elderly insomnia patients significantly increased sleep time, sleep efficiency, and serum melatonin, while reducing sleep-onset latency (−17 min vs placebo) and early-morning awakenings. The cornerstone insomnia RCT for clinical dose recommendations.
- [3] Wienecke 2016 PMID 27933574 — Long-term HRV analysis shows stress reduction by magnesium intake. Chronic stress markers and HRV improved on chelated magnesium supplementation, with chelate forms showing markedly superior plasma uptake and clinical effect vs inorganic salts. Supports the bioavailability gap between glycinate and oxide.
- [4] Slutsky 2010 PMID 20152124 — Enhancement of learning and memory by elevating brain magnesium. Magnesium L-Threonate uniquely raised cerebrospinal-fluid magnesium and enhanced both short-term synaptic plasticity and long-term potentiation in rodent models, with measurable improvements in working memory and spatial learning. The foundational study behind the Magtein patent.
- [5] Mah & Pitre 2021 PMID 33865376 — Oral magnesium supplementation for insomnia in older adults: a systematic review & meta-analysis. Pooled meta-analysis of 3 RCTs (n=151) showed magnesium supplementation reduced sleep-onset latency by ~17 minutes and increased total sleep time vs placebo in older adults with insomnia. Provided the strongest quantitative summary of the magnesium-sleep effect.
- [6] Boyle 2017 PMID 28445426 — The effects of magnesium supplementation on subjective anxiety and stress — a systematic review. Systematic review of 18 trials covering supplemental magnesium and subjective anxiety/stress. Found beneficial effects across mildly anxious and stressed populations, with the strongest signal in subjects with low baseline magnesium status — supports the stress-anxiety use case on this list.
More Magnesium Guides
- Best Magnesium SupplementsThe definitive magnesium buying guide — the single best pick for each need across glycinate, L-threonate, and citrate. Glycinate is the default for sleep & anxiety; threonate for cognition; citrate for regularity; oxide is junk.
- Best Form of Magnesium: All Forms Compared by Use CaseThere's no single best magnesium — the right form depends on your goal. Glycinate for sleep + anxiety, citrate for constipation, L-threonate for cognition, oxide to skip. All forms compared by bioavailability + use case.
- Best Magnesium for AnxietyGlycinate dominates the anxiety use case harder than the sleep use case — glycine hits the NMDA co-agonist site, magnesium potentiates GABA-A. Ranked for the 300-500 mg anxiety dose window + AM/PM cortisol-smoothing flexibility.
- Best Magnesium for ConstipationCitrate dominates (osmotic) and glycinate sinks (chelated, no laxative effect) — the form ranking is fully inverted vs. magnesium-for-sleep, with acute breakthrough + chronic maintenance protocols spelled out.
- Best Magnesium for Leg CrampsTen magnesium products ranked for leg + muscle cramps by which form reaches muscle tissue — glycinate and citrate lead, brain-targeted L-threonate drops.
- Best Magnesium for MigrainesTen magnesium supplements for migraine prophylaxis — ranked by form, the 400-600mg AAN/AHS Level B dose, high-dose tolerability, testing, and price.
- Best Magnesium Glycinate SupplementsMagnesium glycinate ranked by ELEMENTAL magnesium (not compound mg), true-chelate integrity, and third-party testing — the form for sleep, anxiety and repletion.
- Best Magnesium L-Threonate (Magtein) SupplementsMagnesium L-threonate (Magtein) ranked for cognition — the only form that meaningfully raises brain magnesium. Honest about its low elemental dose (not for repletion) and premium price.
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