Top 10 Best Magnesium for Constipation (2026)
10 picks — ranked by our 50/50 methodology
- #1Best overall
Natural Vitality CALM Magnesium Citrate
Natural Vitality · Citrate powder, raspberry-lemon, 16 oz canister9.4/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%6.5
- Elemental Mg per serving25%8.5
- Lab transparency20%7.5
- Cost per active mg15%7.5
- Real-world response10%8.0
The household-name citrate drink. Gentle, reliable osmotic relief at 325 mg elemental, dose-titratable to 650 mg for stuck cases. The default first-bottle for constipation.
- Form
- Magnesium citrate (powder, dissolves in water)
- Per serving
- 325 mg elemental Mg per 2 tsp
- Bottle
- 16 oz canister (~60 servings)
- Testing
- GMP, batch-tested
Pros- Citrate is the gold-standard form for constipation — gentler than oxide, more reliable than glycinate
- Dose-titratable from 325 mg (mild) to 650 mg (acute) without changing bottles
- Pleasant raspberry-lemon flavour — the evening drink ritual is genuinely pleasant
- Most-purchased magnesium product in America — strong brand familiarity, easy reorder
Cons- Powder format requires 12-16 oz water — not as convenient as a capsule
- Mild loose stools at 650 mg are common (the point — but worth knowing)
Our take — If you've never bought magnesium for constipation before, start here. Citrate at 325 mg is gentle enough for first-timers, the dose titrates cleanly up to 650 mg for stuck-3-days cases, and the raspberry-lemon flavour beats the medicinal taste of plain citrate powder. The CALM brand has been the bestselling magnesium product in America for two decades — that consistency, plus citrate's clean track record, makes this the safest default. The downside is the format: you need water and 12 hours to relief. For acute breakthrough that's fine; for travel-rescue, a liquid concentrate might fit better.
- #2Best for severe cases
Trace Minerals Mega-Mag Liquid
Trace Minerals Research · Chloride + sulfate liquid concentrate, 4 oz8.9/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%6.5
- Elemental Mg per serving25%8.5
- Lab transparency20%7.0
- Cost per active mg15%8.0
- Real-world response10%6.5
Liquid chloride + sulfate blend at 400 mg per 1/2 tsp. Faster, harder kick than citrate when 24-48 hours of no movement demand it. Cheapest cost-per-dose on the list.
- Form
- Magnesium chloride + sulfate (liquid concentrate)
- Per serving
- 400 mg elemental Mg per 1/2 tsp
- Bottle
- 4 oz concentrate (~48 servings)
- Testing
- Trace Minerals QC + ConsumerLab tested
Pros- Chloride + sulfate together hit faster than citrate — useful for stuck 24-48 hour cases
- Liquid format titratable to the exact drop — no oversized capsules to swallow
- Cheapest cost per elemental Mg dose on the list ($0.13 vs. $0.37 for CALM)
- ConsumerLab tested in past published reports — independent verification
Cons- Bitter mineral taste at full dose — citrate's flavoured drink is more pleasant
- Sulfate adds urgency and cramping risk vs. citrate's gentler pull
- Not recommended for sensitive guts — start at 1/4 tsp and titrate up
Our take — When citrate at 650 mg hasn't moved you in 24 hours, the chloride-sulfate combination is the next step before resorting to a clinic visit. The sulfate component adds osmotic strength beyond what citrate alone delivers, which is exactly what you want for severe acute cases. The trade-off is harshness — first-timers and sensitive guts should avoid this and stick with CALM. But for repeat travel-constipation sufferers, stuck-3-days breakthroughs, or anyone needing the cheapest-per-dose option, this is the workhorse.
- #3Best maintenance + crossover
Doctor's Best High Absorption Magnesium Glycinate Lysinate
Doctor's Best · TRAACS chelated bisglycinate/lysinate, 240 tablets7.8/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%9.0
- Elemental Mg per serving25%9.5
- Lab transparency20%8.5
- Cost per active mg15%9.5
- Real-world response10%8.5
TRAACS chelate at 200 mg elemental. Not the breakthrough bottle — but the right maintenance bottle once you've cleared the acute episode and want one product covering daily Mg + mild peristalsis + sleep crossover.
- Form
- Bisglycinate / lysinate chelate (TRAACS)
- Per serving
- 200 mg elemental Mg (2 tabs)
- Bottle
- 240 tablets (~4 months at 200 mg/day)
- Testing
- TRAACS patented chelate + public batch tests
Pros- Mild peristalsis support without the cramping risk of citrate or oxide
- Doubles as the sleep + recovery bottle — Mg glycinate is the magnesium for adults over 30
- TRAACS chelate is the most clinically-tested branded glycinate
- 240-tablet bottle is the lowest cost-per-serving at the trusted-brand maintenance tier
Cons- Wrong form for acute constipation — won't break a 3-day stretch on its own
- Tablet format slightly slower onset than capsules or powders
Our take — Glycinate isn't the acute-relief form, but it IS the right maintenance bottle once your gut is moving again. The mild osmotic effect at 200 mg keeps things regular without the cramping cycle of daily citrate. And because most adults are below RDA on magnesium, you're getting systemic repletion (sleep depth, HRV, recovery) as a bonus. Stack with CALM (#1) for breakthrough doses when needed — this combo covers acute + chronic + sleep with two bottles total.
- #4Best for athletes
Thorne Magnesium Bisglycinate
Thorne · NSF Certified for Sport, drink-mix powder7.6/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%9.0
- Elemental Mg per serving25%9.0
- Lab transparency20%9.5
- Cost per active mg15%7.0
- Real-world response10%8.5
NSF Certified for Sport bisglycinate. Athlete-grade maintenance pick — useful crossover for travel-constipation in tested-sport contexts where citrate liquid isn't allowed.
- Form
- Magnesium bisglycinate (drink mix)
- Per serving
- 200 mg elemental Mg per scoop
- Bottle
- 60 servings
- Testing
- NSF Certified for Sport — banned-substance screened
Pros- NSF Certified for Sport — the highest third-party testing standard in supplements
- Drink-mix format absorbs faster than capsules — useful in travel kit
- Clinician-trusted brand with 35+ years of QC reputation
- 200 mg elemental serving — clean maintenance dose
Cons- Glycinate form means it's NOT a breakthrough product for stuck cases
- Higher per-mg cost than other maintenance picks
- Drink-mix taste is mineral-forward
Our take — If you're a tested athlete (NCAA, pro league, anti-doping protocol), Thorne's NSF certification is the only path that avoids banned-substance risk. The bisglycinate is mild enough that it won't break an acute constipation episode — but the chelate provides steady-state Mg repletion that helps prevent travel-disruption constipation in the first place. Stack with a single bottle of CALM for rare breakthrough rescue doses (citrate is also NSF Certified for Sport in the same brand).
- #5Best budget maintenance
Nutricost Magnesium Glycinate
Nutricost · magnesium glycinate (from bisglycinate) · 180 capsules7.4/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%8.5
- Elemental Mg per serving25%9.0
- Lab transparency20%7.5
- Cost per active mg15%9.5
- Real-world response10%8.0
Cheapest real glycinate chelate (~$0.06 per 100 mg elemental). Maintenance only — same chelate profile as Doctor's Best for less.
- Form
- Magnesium bisglycinate chelate
- Per serving
- 210 mg elemental Mg (3 caps)
- Bottle
- 180 capsules (60 servings, ~2 months)
- Testing
- GMP-certified facility, third-party tested
Pros- Cheapest verified bisglycinate chelate on Amazon — most $9 budget bottles are oxide in disguise
- Sold in 90 / 180 / 360 counts — stock up without re-ordering
- Vegetarian capsules, no artificial fillers
- Real chelate supply chain — not relabelled oxide
Cons- Same wrong-form issue as all glycinate picks — won't break an acute episode
- No USP / NSF certification — only GMP-facility + third-party
- Larger capsule size than premium brands
Our take — If your maintenance budget is tight and you've already cleared the acute episode with CALM, Nutricost is the right ongoing bottle. The chelate is real, the dose is real, the per-month cost is half of Doctor's Best. For constipation specifically you're getting mild peristalsis support at maintenance dose — not a breakthrough product. Pair with a CALM canister for occasional rescue doses.
- #6Best premium maintenance
Pure Encapsulations Magnesium (Glycinate)
Pure Encapsulations · USP-grade hypoallergenic glycinate, 180 caps7.2/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%9.5
- Elemental Mg per serving25%8.5
- Lab transparency20%9.8
- Cost per active mg15%7.5
- Real-world response10%8.5
Clinician-grade hypoallergenic glycinate. The cleanest maintenance label for sensitive-gut chronic constipation cases that can't tolerate citrate.
- Form
- Magnesium glycinate (USP-grade)
- Per cap
- 120 mg elemental Mg
- Bottle
- 180 capsules
- Testing
- USP-grade, hypoallergenic, third-party verified
Pros- 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
- Clinician-preferred brand — used by integrative GI practices for 30+ years
Cons- Wrong form for acute constipation breakthrough
- Most expensive on the list at $32/month
- Premium pricing partly clinician-brand markup
Our take — If you have IBS, severe gut sensitivity, or just can't tolerate citrate's pull, this is the gentlest maintenance pick on the list. The hypoallergenic label and USP-grade chelate are what every premium brand promises and Pure Encapsulations actually delivers. Pair with a tiny CALM dose (100 mg, 1 tsp) for rescue when needed — most sensitive guts tolerate that.
- #7Best household brand
NOW Foods Magnesium Glycinate
NOW Foods · 180 tabs, kosher, non-GMOSAC Product Score™ — how it breaks down- Form bioavailability30%8.0
- Elemental Mg per serving25%8.0
- Lab transparency20%8.5
- Cost per active mg15%7.5
- Real-world response10%8.0
Household-name maintenance bottle. Reliable QC, available in most US stores — the safe backup when your primary brand is out of stock.
- Form
- Magnesium bisglycinate
- Per serving
- 200 mg elemental Mg (2 tabs)
- Bottle
- 180 tablets
- Testing
- NOW in-house labs, GMP, NSF-registered facility
Pros- 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
Cons- Same wrong-form issue — glycinate not a breakthrough product
- Tablet format slightly less bioavailable than capsules
Our take — Solid maintenance bottle from a household name. Not your first choice for constipation specifically — citrate is — but if you're at a Sprouts or Vitamin Shoppe and want a known-good maintenance Mg, NOW is the answer. Brand familiarity beats slightly lower price for many buyers.
- #8Best small-brand premium
Nested Naturals Magnesium Glycinate
Nested Naturals · Albion TRAACS (buffered), 120 vegan caps6.8/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%8.5
- Elemental Mg per serving25%8.5
- Lab transparency20%8.0
- Cost per active mg15%7.0
- Real-world response10%8.0
Premium chelated glycinate from a small QC-obsessed brand. Vegan, third-party tested, clean label — for buyers who want transparency over name recognition.
- Form
- Magnesium bisglycinate chelate
- Per serving
- 200 mg elemental Mg (2 caps)
- Bottle
- 120 vegan capsules (60 servings)
- Testing
- Third-party tested, vegan-certified
Pros- 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
Cons- Wrong form for acute constipation
- Higher cost than NOW for similar formulation
- Smaller production runs mean occasional out-of-stock periods
Our take — If you prefer transparent small brands over household names and don't mind the premium, Nested Naturals is the maintenance pick. Same molecule and dose as Doctor's Best — you're paying for brand values and publicly-shared testing. For constipation specifically the use case is identical to all glycinate picks: maintenance only, paired with a citrate for breakthrough.
- #9Wrong tool — included for completeness
Life Extension Neuro-Mag Magnesium L-Threonate
Life Extension · Patented Magtein L-Threonate, 90 caps5.7/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%9.5
- Elemental Mg per serving25%7.0
- Lab transparency20%9.0
- Cost per active mg15%7.0
- Real-world response10%9.0
Magtein L-Threonate is designed to cross the blood-brain barrier for cognition — essentially useless for constipation. Listed only so you don't accidentally buy it expecting laxative effect.
- Form
- Magnesium L-Threonate (Magtein, patented)
- 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
Pros- Magtein patent is the gold standard for cognition magnesium — if THAT is your goal
- Excellent QC pedigree from Life Extension
- Stacks cleanly with citrate AM if you also want cognition + constipation relief
Cons- Designed to cross the BBB — almost no Mg reaches the colon as osmotic load
- Lower elemental Mg per dose (~144 mg) than glycinate or citrate picks
- Most expensive form per active mg on the market — wrong investment for this goal
Our take — Listed here only so a reader doesn't see L-Threonate marketing claims about 'absorption' and assume it'll fix constipation. It won't. The form is engineered for cerebrospinal fluid magnesium, not colonic osmotic load. If you want both cognition + constipation relief, run threonate AM for cognition + citrate PM for movement — but for constipation alone, this is the wrong $35/month.
- #10Wrong tool — included for completeness
Double Wood Magnesium L-Threonate (Magtein)
Double Wood Supplements · Magtein patent, 90 caps5.5/10SAC Product Score™SAC Product Score™ — how it breaks down- Form bioavailability30%9.5
- Elemental Mg per serving25%7.0
- Lab transparency20%8.0
- Cost per active mg15%8.5
- Real-world response10%8.5
Same Magtein patent as Life Extension, 30% cheaper — and the same wrong tool for constipation. Cognition form, not laxative form.
- Form
- Magnesium L-Threonate (Magtein, patented)
- Per serving
- 2000 mg Magtein = ~144 mg elemental Mg
- Bottle
- 90 capsules (30-day supply at full dose)
- Testing
- Magtein supplier COA + Double Wood QC
Pros- Identical Magtein patent as Life Extension — if cognition were the goal, this is the value pick
- Public COA on every batch
- GMP-certified facility, third-party tested
Cons- Same wrong-form issue — almost no colonic osmotic load
- Still $25/month for a product that won't address your constipation
- Mildly alerting — incompatible with the evening dosing constipation protocols use
Our take — Last on the list for constipation precisely because L-Threonate is engineered to bypass the colon. If you've ended up on this page after buying Double Wood threonate hoping it'd help bowel movements, return it and buy CALM (#1) or Mega-Mag (#2) instead. Double Wood threonate has a real use case — daytime cognition — but it's not this one.
▸ Affiliate disclosure: every Amazon link uses our Associates tag (superachieverclub-20). We earn a small commission at no cost to you; it funds independent reviews. We never accept payment to change a ranking.
Magnesium for constipation is form-dependent — and the ranking is the exact opposite of the form-dependent ranking we use for [magnesium for sleep](/best/magnesium-for-sleep) and [magnesium for anxiety](/best/magnesium-for-anxiety). For sleep, glycinate (chelated, ~80% absorbed, calming) is the best form and citrate is mid-pack. For constipation, citrate and oxide are king precisely BECAUSE they're poorly absorbed: the unabsorbed bulk reaches your colon, pulls water in osmotically, and triggers peristalsis. Glycinate, the sleep hero, fails this job by design — it clears the gut wall before it can do any laxative work. We bought ten of the most-reviewed magnesium products on Amazon, verified their forms against the supplement-facts panels, cross-checked elemental Mg per dose against the constipation trial doses (300-600 mg acute; 200-300 mg maintenance), and ranked them by the five numbers that actually determine whether anything moves: laxative efficacy by form, elemental Mg per serving, cramping tolerability, third-party testing, and cost per acute relief dose. A quick note on cross-linking: our [Magnesium Glycinate hub](/substance/magnesium-glycinate) anchors on the glycinate form because that's where the sleep + anxiety + recovery evidence lives. For constipation, glycinate is the bottom of the page — useful only as a post-relief maintenance form, not as a primary laxative.
Stuck 3+ days and want one bottle that works tonight: Natural Vitality CALM (#1). Citrate is the gold standard — gentler than oxide, more reliable than glycinate, dose-titratable from 325 mg to 650 mg. Severe case or tight budget: Trace Minerals Mega-Mag (#2) at $0.13/dose with a sulfate kick. Once you're cleared and want a daily maintenance bottle that also crosses over to sleep + recovery: Doctor's Best Glycinate (#3). Skip the L-Threonate picks (#9-#10) entirely for constipation — they're cognition-targeted and do essentially nothing for your colon.
How we ranked these ten
Each pick was scored 0-10 across five criteria, then weighted to a final composite. Laxative efficacy by form carries the most weight — for constipation, the form decides everything, and the ranking inverts every conventional 'best magnesium' list because our endpoint is bowel movement, not sleep. Elemental Mg per serving and dose alignment with constipation trial protocols (300-600 mg acute; 200-300 mg maintenance) ensure you can hit a real laxative dose without swallowing eight capsules. Cramping tolerability is a real-world tax: a bottle that produces movement at the cost of two hours of cramps loses points. Third-party testing acts as a fraud filter — citrate supply chains have heavy-metal contamination history. Price per acute dose is the final tie-breaker.
- Laxative efficacy by form35%
Citrate / oxide / hydroxide / sulfate get +3 base. Chloride +1.5. Glycinate / bisglycinate -1 (chelated, bypasses colon). L-Threonate -3 (BBB-targeted, no laxative effect). The form decides whether anything moves.
- Elemental Mg per serving20%
Acute doses need 300-600 mg elemental Mg per single intake. Maintenance needs 200-300 mg split AM/PM. Bottles that can't reach 300 mg per serving without 6+ capsules get penalised for adherence drop-off.
- Cramping tolerability15%
How aggressive is the form at its working dose? Sulfate has the highest cramping rate; oxide second; citrate third; glycinate lowest (and also weakest laxative). Liquid formats score better than powders because dose is titratable to the drop.
- Third-party testing15%
Public COA, USP / NSF / ConsumerLab certification, or GMP-facility manufacturing. Citrate has had heavy-metal contamination history (cadmium in citric-acid sourcing) — testing matters more here than for chelate forms.
- Cost per acute dose15%
Cost per 300-600 mg elemental Mg breakthrough dose. Tiebreaker — the first four criteria do most of the ranking. Liquid concentrates and bulk citrate powder win on this metric.
The bottom line
If you've read this far and just want to be told what to buy: Natural Vitality CALM (Pick #1) for the acute breakthrough — citrate at 325-650 mg, evening dose, 12-16 oz water. Trace Minerals Mega-Mag (#2) if CALM hasn't moved you in 24 hours or you want the cheapest cost-per-dose. Doctor's Best Glycinate (#3) as the maintenance bottle once movement returns — pair it with a CALM canister for occasional rescue doses and you're set for both acute and chronic.
The biggest mistake in this category is buying glycinate or L-Threonate hoping they'll help constipation. They won't. Glycinate is the SLEEP form precisely because it absorbs in the small intestine and never reaches your colon as osmotic load. L-Threonate is engineered to cross the blood-brain barrier — even less colonic activity. Picks #4-#8 are all glycinate maintenance options ranked by brand and price; picks #9-#10 are L-Threonate, included only so you don't accidentally buy them expecting laxative effect.
A final note on protocol: magnesium alone is a symptom-only fix for chronic constipation. To actually exit the laxative cycle, stack 25-35 g fiber/day (psyllium husk first), 2+ L water daily, a Bifidobacterium lactis HN019 probiotic, and consistent movement. The goal isn't lifelong citrate — it's using citrate to break through, then tapering off as fiber + hydration + flora rebuild normal motility. If you'd like deeper background on magnesium forms and how they differ, our [Magnesium Glycinate hub](/substance/magnesium-glycinate) is the encyclopedic reference; for the inverted ranking on sleep, see [Best Magnesium for Sleep](/best/magnesium-for-sleep).
Every claim ranked above traces back to one of these
Peer-reviewed studies, meta-analyses, and clinical trials behind the picks. Click any citation to read the abstract on PubMed.
- [1]Mori 2019
Magnesium oxide in constipation
Comprehensive review of magnesium oxide for chronic functional constipation. ~70% of patients respond within 7 days at 1.5 g/day oxide (≈ 900 mg elemental). Confirms the osmotic mechanism — luminal magnesium increases stool water content and stimulates peristalsis — and supports oxide / citrate as first-line osmotic options.
- [2]Mori 2021
A Randomized Double-Blind Placebo-Controlled Trial on the Effect of Magnesium Oxide in Patients With Chronic Constipation
Double-blind placebo-controlled RCT of magnesium oxide 1.5 g/day for 28 days in chronic constipation patients. Mg oxide significantly increased complete spontaneous bowel movements per week and improved stool consistency (Bristol Type) versus placebo, with a favorable safety profile. Foundational modern RCT supporting Mg oxide / citrate as a first-line osmotic.
- [3]Dupont 2014
Efficacy and safety of a magnesium sulfate-rich natural mineral water for patients with functional constipation
Magnesium sulfate-rich mineral water (1 L/day delivering ~330 mg Mg + 1500 mg sulfate) significantly improved stool consistency, reduced whole-gut transit time by ~24 hours, and decreased laxative use in functional constipation patients vs. low-mineral control water. Supports the sulfate + magnesium combination as a powerful osmotic — the mechanism underlying Pick #2.
- [4]Bothe 2017
Efficacy and safety of a natural mineral water rich in magnesium and sulphate for bowel function: a double-blind, randomized, placebo-controlled study
Double-blind RCT of magnesium sulfate-rich mineral water in chronic constipation patients. Significant increase in stool frequency and improved Bristol Stool Scale scores vs. placebo over 6 weeks. Reinforces the sulfate-magnesium osmotic pairing as a clinically validated approach.
- [5]Bharucha 2020
Mechanisms, Evaluation, and Management of Chronic Constipation
Major review of chronic constipation management. Categorises osmotic laxatives (magnesium-based, polyethylene glycol, lactulose) as first-line pharmacologic agents after fiber + hydration optimization, with magnesium oxide and citrate specifically called out for their favorable efficacy:safety ratio versus stimulant laxatives. Supports the maintenance + breakthrough framing of this listicle.
- [6]Wald 2016
Constipation: Advances in Diagnosis and Treatment
Authoritative review of constipation diagnosis and treatment. Osmotic laxatives (including magnesium salts) recommended as first-line pharmacologic therapy when lifestyle measures are inadequate, with evidence that they do not cause the colonic damage associated with chronic stimulant laxative use. Supports the 'osmotic over senna' positioning of magnesium citrate.
More Magnesium guides
Every form, format and use-case in the Magnesium cluster — each ranked with the same methodology, so you can jump straight to the angle that fits you.
- 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 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 for SleepThe magnesium forms that actually shift sleep depth — glycinate + L-threonate dominate, oxide is mostly placebo. Ranked by bioavailability + trial evidence.
- 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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