Magnesium L-threonate vs glycinate — which should I buy?

They solve different problems and most people who research carefully end up running both. Glycinate is the peripheral/body form: high elemental magnesium, gentle on the gut, the right pick for sleep onset, anxiety, muscle cramps, and correcting a magnesium deficiency. L-threonate is the central/brain form: the only magnesium with trial data (Slutsky 2010, Liu 2016) showing it meaningfully raises BRAIN magnesium and supports memory, focus, and executive function. The catch is that threonate delivers only ~144 mg of elemental magnesium per serving — too little to fix sleep or cramps. So: cognition is your goal -> threonate. Sleep, cramps, deficiency -> glycinate. Both goals -> threonate AM + glycinate PM.

Is magnesium L-threonate worth the premium over cheaper magnesium?

Only if cognition is specifically what you're buying. A magnesium glycinate costs $0.08-0.15 per serving and delivers far more elemental magnesium; threonate runs $0.70-1.20 per serving and delivers less. On a cost-per-elemental-mg basis, threonate is 8-12x more expensive and looks like a terrible deal. But that's the wrong comparison — you're not paying for elemental magnesium, you're paying for the only form that gets magnesium into brain tissue. There is no cheaper way to do that. If you want the brain effect, the premium is justified. If you just want 'more magnesium,' it's a waste of money.

Why is the elemental magnesium so low (only 144 mg)?

Because L-threonate is a heavy carrier molecule. Magtein is the magnesium salt of L-threonic acid (a vitamin C metabolite), and magnesium is only about 7% of that compound by weight — so 2000 mg of Magtein yields ~144 mg of actual elemental magnesium. Compare bisglycinate at ~14% elemental. This is the single biggest misconception in the category: people see '2000 mg magnesium L-threonate' and assume 2000 mg of magnesium. It isn't. For brain delivery that's fine — the threonate IS the feature. But it means this is the wrong form for repletion, sleep, or cramps, where you actually need the higher elemental dose from glycinate.

How many capsules do I actually have to take, and how long does a bottle last?

The trial dose is 3 capsules per day for most brands (Life Extension, Jarrow, NOW, Momentous, Source Naturals) and 4 capsules per day for Double Wood. That means a '90-count' bottle is a 30-day supply, not 90 days, and Double Wood's '120-count' is also 30 days. This trips up first-time buyers who think they're getting a 3-month supply. Always divide the cap count by caps-per-dose to get the real number of days, then compute true monthly cost before comparing prices across brands.

Does the Magtein patent actually matter, or is generic L-threonate fine?

It matters more here than in most supplement categories. Magtein is the specific, quality-controlled stereoisomer of magnesium L-threonate that the published RCTs (Slutsky 2010, Liu 2016, Abumaria 2011) actually measured. Generic 'magnesium L-threonate' on Amazon is increasingly common at a lower price, but the chemistry is not guaranteed identical, and there's no comparative trial data showing generics deliver the same brain uptake. For a form whose entire value proposition is crossing the blood-brain barrier, paying the small premium for verified, licensed Magtein is worth it. Check the label or supplement-facts panel for the Magtein trademark.

When will I notice anything, and what should I expect to feel?

Expect subtle and slow, not a same-day stimulant. The Liu 2016 trial measured improvement on executive-function tests at 12 weeks. Anecdotally, users report sharper word recall and less brain fog on demanding mental work around weeks 4-6. The mechanism is structural — threonate raises brain magnesium, which regulates NMDA glutamate-receptor density and synaptic plasticity — so the benefit accrues over time rather than hitting in an hour. If you want acute focus, that's caffeine + L-theanine; threonate is the long-game lever for the aging or high-demand brain.

Can I take magnesium L-threonate at night to help me sleep?

It's not the right form for sleep, and for some people it's mildly counterproductive at night. Threonate's brain-magnesium effect can be subtly activating (increased synaptic activity reads as alertness), so evening dosing can interfere with sleep onset in sensitive users — the opposite of glycinate, which is calming. If sleep is your goal, take a magnesium glycinate 60-90 minutes before bed and keep threonate to the morning/early afternoon. If you want both brain support and better sleep, that's exactly the threonate-AM / glycinate-PM stack.

Bodyintermediate

Top 7 Best Magnesium L-Threonate (Magtein) Supplements (2026)

★ Our own formula

We make this one. Our own Super Achiever formula — held to the exact same 50/50 criteria as every pick below, and we put it up top so you see it first. Full transparency: it's ours.

#0
Chelated
Super Achiever Magnesium Glycinate
Super Achiever Club · ships direct from our store
9.1/10SAC Product Score™
Our in-house chelated magnesium glycinate — the gentle, brain-available form behind the sleep and anxiety evidence. Pinned here because it's ours, held to the same 50/50 criteria.
$35
90 caps · 500 mg glycinate per cap
Form
Magnesium glycinate (bisglycinate chelate)
Size
90 capsules
Dose
500 mg magnesium glycinate per cap
Best for
Sleep, anxiety, daily repletion
Pros
- True chelated glycinate — the gentlest, best-absorbed form
- The sleep/anxiety-relevant form (GABA pathway + glycine cofactor)
- 90-cap bottle — over a month's nightly supply
- Ships direct from us — no marketplace middleman
Honest trade-offs
- Glycinate only — not the citrate form for constipation
- Capsules, not a loose powder if you prefer to dose by feel
- Premium vs. the cheap oxide magnesium in multivitamins
Our take — If glycinate is the form you want — and for sleep, anxiety and repletion it is — this is our own take, the gentle chelate at a real dose. Not the form for constipation (that's citrate), but for everything glycinate is good at, it's a clean buy.
Shop at Super Achiever Club →

▸ The ranked list

7 picks — ranked by our 50/50 methodology

#1
Best overall
Life Extension Neuro-Mag Magnesium L-Threonate
Life Extension · licensed Magtein · 90 vegetarian capsules
9.2/10SAC 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
The category benchmark. Licensed, patent-verified Magtein at the exact Liu 2016 trial dose, backed by Life Extension's published per-batch testing — the cleanest default for cognition.
$28 / 90 caps (30-day supply)
~$0.93 / 3-cap serving
Active form
Magnesium L-Threonate (licensed Magtein)
Per serving
2000 mg Magtein = 144 mg elemental Mg (3 capsules)
Bottle / supply
90 caps = 30-day supply at 3 caps/day
Testing
Per-batch testing published; Magtein chain-of-custody documented
Pros
- Licensed, patent-verified Magtein — the form the RCTs measured
- Exact Liu 2016 trial dose (2000 mg Magtein) at 3 caps/day
- Life Extension's QC and per-batch transparency is the category benchmark
- Fair ~$0.93/serving for the elite-QC tier
Cons
- Not NSF Certified for Sport — drug-tested athletes should jump to Momentous (#2)
- Like all threonate, low elemental yield — pair a glycinate for peripheral needs
Our take — The default cognition pick, and the bottle the rest of the list is measured against. You get verified Magtein, the precise trial dose at a manageable 3 capsules, and Life Extension's published per-batch testing — all at a fair price for the QC tier. Run it in the morning, give it 4-12 weeks, and stack a magnesium glycinate at night if you also want sleep and cramp coverage. The only honest reasons to pick something else: federation drug testing (Momentous #2) or squeezing the lowest price (Double Wood #3).
Check Life Extension Neuro-Mag on Amazon →Read the full review →
#2
Best premium
Momentous Magnesium L-Threonate (Magtein)
Momentous · licensed Magtein · NSF Certified for Sport · 90 capsules
9/10SAC Product Score™
SAC Product Score™ — how it breaks down
- Form / Magtein verification30%9.5
- Elemental Mg + dose honesty25%8.5
- Third-party testing + QC20%9.8
- Cost per elemental mg15%6.5
- Real-world response + value10%9.0
NSF Certified for Sport on the licensed Magtein form — the federation-safe threonate for drug-tested athletes who can't risk contamination.
$35 / 90 caps (30-day supply)
~$1.17 / 3-cap serving
Active form
Magnesium L-Threonate (licensed Magtein)
Per serving
2000 mg Magtein = 145 mg elemental Mg (3 capsules)
Bottle / supply
90 caps = 30-day supply at 3 caps/day
Testing
NSF Certified for Sport — banned-substance tested
Pros
- 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 #1 with banned-substance certification layered on
Cons
- Highest cost per serving on the list (~$1.17)
- You're paying for certification, not a better cognitive effect
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 (#1); the premium buys the certification, not extra brain magnesium. Worth it if your sport requires it; overkill if it doesn't.
Check Momentous Magtein on Amazon →Read the full review →
#3
Best value
Double Wood Magnesium L-Threonate (Magtein)
Double Wood · licensed Magtein · NSF Certified · 120 capsules
8.6/10SAC 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
The cheapest verified Magtein per serving on the list, and it's NSF Certified. The only catch is a 4-cap daily dose instead of 3.
$23 / 120 caps (30-day supply)
~$0.77 / 4-cap serving
Active form
Magnesium L-Threonate (licensed Magtein)
Per serving
2000 mg Magtein = 144 mg elemental Mg (4 capsules)
Bottle / supply
120 caps = 30-day supply at 4 caps/day
Testing
NSF Certified; third-party batch testing
Pros
- Cheapest verified Magtein per serving on the list (~$0.77)
- NSF Certified — strong third-party testing at a budget price
- Licensed Magtein at the full 2000 mg trial dose
- Good entry point for first-time threonate buyers
Cons
- 4 capsules per dose instead of 3 — a bigger daily pill load
- Brand QC sits a tier below Life Extension's published-batch transparency
Our take — The value pick, and it doesn't cut the corner that matters: it's licensed Magtein, NSF Certified, at the full trial dose. The only trade-off is swallowing four capsules a day instead of three for the same 2000 mg. If price is your deciding factor and you still want verified Magtein with third-party testing, this is the obvious buy. We also publish a full hands-on review of this exact bottle — see the linked deep-dive.
Check Double Wood on Amazon →Read the full review →
#4
Best from a household brand
Jarrow Formulas MagMind (Magtein)
Jarrow Formulas · licensed Magtein · 90 vegetarian capsules
8.4/10SAC Product Score™
SAC Product Score™ — how it breaks down
- Form / Magtein verification30%9.5
- Elemental Mg per serving25%7.0
- Lab transparency + QC20%8.0
- Cost per active mg15%7.0
- Real-world response10%9.0
One of the original Magtein brands, with Jarrow's long QC pedigree. Licensed Magtein at the standard 3-cap trial dose.
$30 / 90 caps (30-day supply)
~$1.00 / 3-cap serving
Active form
Magnesium L-Threonate (licensed Magtein)
Per serving
2000 mg Magtein = 144 mg elemental Mg (3 capsules)
Bottle / supply
90 caps = 30-day supply at 3 caps/day
Testing
Jarrow in-house QC; established batch testing
Pros
- Jarrow's long QC track record — one of the original Magtein brands
- Licensed Magtein at the standard 3-cap trial dose
- Widely stocked online and in stores — easy backup pick
Cons
- No clear advantage over Neuro-Mag (#1) at a similar price
- QC documentation is solid but less publicly detailed than Life Extension's
Our take — A long-trusted, no-surprises Magtein. MagMind was one of the first threonate products to market and Jarrow's QC reputation is well-earned. It does everything Neuro-Mag (#1) does at a comparable price, without a standout edge — so slot it in when it's the better-stocked or better-priced option on the day. Solid, reliable, fairly priced.
Check Jarrow MagMind on Amazon →Read the full review →
#5
Best widely-available
NOW Foods Magtein Magnesium L-Threonate
NOW Foods · licensed Magtein · 90 vegetarian capsules
8.3/10SAC Product Score™
SAC Product Score™ — how it breaks down
- Form / Magtein verification30%9.5
- Elemental Mg per serving25%7.0
- Testing & transparency20%8.5
- Value / cost per active mg15%7.0
- Real-world response10%9.0
NOW's 30+ year in-house QC applied to licensed Magtein. The easiest pick to find on a shelf or in stock online.
$32 / 90 caps (30-day supply)
~$1.07 / 3-cap serving
Active form
Magnesium L-Threonate (licensed Magtein)
Per serving
2000 mg Magtein = 144 mg elemental Mg (3 capsules)
Bottle / supply
90 caps = 30-day supply at 3 caps/day
Testing
NOW in-house labs; GMP-certified; batch QC
Pros
- NOW's in-house QC is among the most consistent in the industry (30+ years)
- Licensed Magtein at the standard 3-cap trial dose
- Easy to source offline at most US health stores as a backup
Cons
- Slightly higher per-serving cost than Neuro-Mag (#1) or Jarrow (#4)
- Not NSF Certified for Sport — use Momentous (#2) if you need that
Our take — The 'grab it off the shelf' Magtein. NOW's three-decade QC pedigree justifies a small premium, and it's the easiest pick to find in stock when the top brands sell out. Same licensed Magtein and trial dose as #1 — just a touch pricier per serving. A dependable backup rather than a first choice.
Check NOW Foods Magtein on Amazon →Read the full review →
#6
Solid alternative
Source Naturals Magtein Magnesium L-Threonate
Source Naturals · licensed Magtein · 90 capsules
8/10SAC Product Score™
SAC Product Score™ — how it breaks down
- Form / Magtein verification30%9.5
- Elemental Mg + dose honesty25%7.0
- Testing + transparency20%7.5
- Cost per active mg15%7.0
- Real-world response10%8.5
Licensed Magtein at 667 mg per capsule from an established brand. No standout edge, but a fine pick when it's the one in stock.
$30 / 90 caps (30-day supply)
~$1.00 / 3-cap serving
Active form
Magnesium L-Threonate (licensed Magtein)
Per serving
2000 mg Magtein = 144 mg elemental Mg (3 capsules)
Per capsule
667 mg Magtein per capsule
Bottle / supply
90 caps = 30-day supply at 3 caps/day
Pros
- Licensed Magtein at the standard 3-cap trial dose
- Established brand with consistent batch QC
- Priced in line with the mid-tier picks
Cons
- No clear advantage over the picks above
- Less public QC documentation than Life Extension or NOW
Our take — A perfectly fine Magtein with no reason to rank it higher and no reason to avoid it. Source Naturals has been in the threonate game a long time and the form is verified. If it's the best-priced or best-stocked licensed Magtein on the day you're buying, it'll do the job exactly as well as the picks above.
Check Source Naturals on Amazon →Read the full review →
#7
Budget (verify the label)
Pure North Naturals Magnesium L-Threonate
Pure North Naturals · Magtein · 125 vegetarian capsules
7.6/10SAC Product Score™
SAC Product Score™ — how it breaks down
- Form / Magtein verification30%6.5
- Elemental Mg + dose honesty25%7.5
- Third-party testing + QC20%6.5
- Cost per elemental mg15%8.0
- Real-world response + value10%7.0
A lower sticker price from a smaller brand, but a heavier 5-cap daily load. Reasonable if budget is the deciding factor — just confirm the Magtein trademark on the live label.
$25 / 125 caps (~25-day supply)
~$1.00 / 5-cap serving
Active form
Magnesium L-Threonate (Magtein on label)
Per serving
144 mg elemental Mg (5 capsules)
Bottle / supply
125 caps = ~25-day supply at 5 caps/day
Testing
Third-party tested
Pros
- Lower sticker price than the major brands
- Third-party tested; 144 mg elemental per serving on label
- Reasonable budget option if you confirm the Magtein trademark
Cons
- Heavy 5-cap-per-day pill load — the most capsules on the list
- Smaller brand with less established QC — verify the label before buying
- Per-serving cost isn't actually lower once you account for caps-per-dose
Our take — The budget end of the list, with the usual caveats. The sticker price looks low, but the 5-cap daily dose means the real per-serving cost lands around the same as the mid-tier picks, and the brand's QC is less established. It's a fine choice if budget is genuinely the deciding factor and you've confirmed the Magtein trademark on the current label — otherwise the small step up to Double Wood (#3) or Neuro-Mag (#1) buys you more confidence.
Check Pure North Naturals on Amazon →Read the full review →

▸ 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 L-threonate is the one magnesium that does something the others can't: it gets magnesium into your brain. Every other popular form — glycinate, citrate, malate, oxide, taurate — acts peripherally, on the body. Threonate is the only form with trial evidence (the Slutsky 2010 MIT paper in Neuron, then the Liu 2016 human RCT) showing it meaningfully raises brain-magnesium levels and supports memory, focus, and executive function. That makes it a genuine cognition tool, not a marketing gimmick. It also makes it the most misunderstood magnesium on the shelf. The label says '2000 mg magnesium L-threonate,' but that yields only about 144 mg of actual elemental magnesium — threonate is a heavy carrier molecule. The trial dose is 3 (sometimes 4) capsules a day, so a 90-count bottle lasts a month, not three. And it costs 8-12x more per milligram of magnesium than a glycinate. None of that is a problem if you understand what you're buying — but if you wanted help sleeping or relief from cramps, you bought the wrong bottle. We bought and verified seven of the most-reviewed Magtein products, checked which actually use the licensed patent, and ranked them on form verification, elemental magnesium, third-party testing, and true cost per trial-dose serving.

Want the default cognition pick: Life Extension Neuro-Mag (#1) — licensed Magtein, exact trial dose, category-best QC, ~$0.93/serving. Tight budget but still verified Magtein: Double Wood (#3) at ~$0.77/serving (4 caps/day). Drug-tested or premium buyer who wants NSF Certified for Sport: Momentous (#2). And if your goal is sleep, cramps, or general magnesium rather than cognition — buy a magnesium glycinate instead; threonate is the wrong, expensive tool for that job.

▸ Methodology

How we ranked these seven

Each pick was scored 0-10 across five criteria, then weighted to a final composite. Magtein verification carries the most weight because the licensed, patented stereoisomer is the only L-threonate the RCTs actually measured — generic threonate may work, but it's unproven. Elemental magnesium and dose honesty (caps-per-dose, label clarity) come next, because the low-elemental trap and the '90-count = 30 days' surprise are where buyers get burned. Third-party testing and brand QC set the safety floor, and cost per elemental mg is the economic tiebreaker within an inherently premium category.

Form / Magtein verification30%
Does it use licensed, patent-verified Magtein (the form in Slutsky 2010 and Liu 2016) or unverified generic 'magnesium L-threonate'? Licensed Magtein gets the top score; generic loses points for lack of comparative trial data.
Elemental Mg + dose honesty25%
Does the serving hit the ~144 mg elemental / 2000 mg Magtein trial dose, and is the label honest about caps-per-dose and elemental yield? Bottles that obscure the '90-count = 30-day' math or imply 2000 mg of elemental magnesium lose points.
Third-party testing + QC20%
NSF Certified for Sport, NSF Certified, or published per-batch testing, plus the brand's track record. NSF for Sport wins for drug-tested athletes; published batch testing and a long QC history win for everyone else.
Cost per elemental mg15%
True monthly cost divided by elemental magnesium delivered, accounting for caps-per-dose. The honest target is $0.70-1.00 per trial-dose serving; above ~$1.20 you're paying a brand premium.
Real-world response + value10%
Documented cognitive response (the threonate signal is modest but reproducible) and overall value within the threonate tier. Acts as the tiebreaker between otherwise-equivalent Magtein bottles.

How it works

How magnesium L-threonate works on the brain

One delivery trick, one downstream system. The chain from capsule to sharper recall runs through the blood-brain barrier and NMDA-receptor density.

Threonate ferries magnesium across the BBB
L-threonic acid acts as a carrier that gets magnesium across the blood-brain barrier — something glycinate, citrate, and oxide can't do efficiently. This is the entire reason the form exists.
Brain magnesium concentration rises
In the Slutsky 2010 work, only threonate measurably raised brain-magnesium levels. Elevated brain Mg regulates NMDA glutamate-receptor density — the receptor system behind learning and memory.
Synaptic plasticity + cognition improve
Higher NMDA-receptor density supports synaptic plasticity. Over weeks this shows up as better memory and executive function — Liu 2016 measured ~9% improvement at 12 weeks in older adults.

▸ Verdict

The bottom line

If you've read this far and just want to be told what to buy: Life Extension Neuro-Mag (Pick #1) is the default — licensed Magtein, the exact trial dose at a manageable 3 capsules, category-best QC, and a fair price. Double Wood (#3) is the value pick if you want the same verified Magtein for less and don't mind a 4-capsule dose. Momentous (#2) is the call if you're drug-tested and need NSF Certified for Sport. Picks #4-7 are situational — Jarrow, NOW, and Source Naturals are dependable licensed-Magtein backups when the top picks are out of stock, and Pure North Naturals is the budget play once you've verified the label.

But the most important decision happens before you pick a brand: is cognition actually your goal? Magnesium L-threonate is the only form that meaningfully raises brain magnesium, which makes it a real tool for memory and focus — but it delivers only ~144 mg of elemental magnesium per serving, costs 8-12x more per milligram than a glycinate, and requires 3-5 capsules a day. If what you really want is better sleep, fewer cramps, or to correct a magnesium deficiency, threonate is the wrong, expensive bottle. Buy a magnesium glycinate instead.

For the right user, the protocol is simple: take the 2000 mg Magtein trial dose in the morning or early afternoon (it can be mildly activating at night), give it 4-12 weeks rather than judging it in days, and pair a magnesium glycinate at bedtime if you also want the peripheral benefits. Verify Magtein on the label, do the caps-per-dose math so the '90-count = 30 days' reality doesn't surprise you, and put the brain form where it belongs — on the brain, alongside, not instead of, a glycinate for the rest of the body.

▸ Research & sources

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.

▸ Keep exploring

More Magnesium Glycinate guides

Every form, format and use-case in the Magnesium Glycinate cluster — each ranked with the same methodology, so you can jump straight to the angle that fits you.

Frequently Asked

Quick answers

They solve different problems and most people who research carefully end up running both. Glycinate is the peripheral/body form: high elemental magnesium, gentle on the gut, the right pick for sleep onset, anxiety, muscle cramps, and correcting a magnesium deficiency. L-threonate is the central/brain form: the only magnesium with trial data (Slutsky 2010, Liu 2016) showing it meaningfully raises BRAIN magnesium and supports memory, focus, and executive function. The catch is that threonate delivers only ~144 mg of elemental magnesium per serving — too little to fix sleep or cramps. So: cognition is your goal -> threonate. Sleep, cramps, deficiency -> glycinate. Both goals -> threonate AM + glycinate PM.

Glossary

Terms used in this mission

Magnesium L-threonate: The magnesium salt of L-threonic acid (a vitamin C metabolite). The only magnesium form shown in trials to meaningfully raise brain magnesium. ~7% elemental magnesium by weight — so high compound dose, low elemental yield.
Magtein: The patented, quality-controlled form of magnesium L-threonate (originally Magceutics) used in the published cognition RCTs. The specific stereoisomer the science actually measured.
Elemental magnesium: The amount of actual magnesium delivered, as opposed to the weight of the whole compound. 2000 mg of Magtein yields ~144 mg of elemental magnesium.
Blood-brain barrier (BBB): The selective membrane protecting the brain. Most magnesium forms can't raise brain magnesium because they don't cross it efficiently; threonate is the form shown to do so.
NMDA receptor: A glutamate receptor central to learning, memory, and synaptic plasticity. Brain magnesium regulates its density; threonate-driven Mg elevation is the proposed mechanism for cognitive benefit.
Synaptic plasticity: The brain's ability to strengthen or weaken connections between neurons — the cellular basis of learning and memory. Elevated brain magnesium supports it (Slutsky 2010).

Why people trust us

5 RCTs

Reviewed for this list

7 products

Each Magtein status verified

Cognition first

We tell sleep buyers to get glycinate

Affiliate-transparent

Every link disclosed

“Bought threonate expecting it to fix my sleep — wrong form, learned that the hard way. Switched it to mornings, added glycinate at night, and within six weeks my recall at work was noticeably sharper. The AM/PM split is the move.”
Daniel K.· Member · Mind chapter Lv. 12

“The caps-per-dose thing got me. I thought a 90-count was three months. It's one. Once I did the real monthly math, Double Wood's Magtein was the obvious value pick.”
Marcus T.· Member · Mind chapter Lv. 9

“I'm 56 and this is the one nootropic-ish thing I've kept. Subtle, not flashy — but four months in, word-finding is just easier. Stuck with licensed Magtein after reading the trials.”
Sara L.· Member · Mind chapter Lv. 14

▸ Build your character

Stop reading. Start leveling.

One free quiz · personalized AI Coach path · 4 missions this week. Build your character, build your life.

AI Coach picks 4 missions tailored to your goal
Earn XP, build streaks, level up four chapters
All evidence-based — no fluff, no upsells

Start your character →Browse missions

Top 7 Best Magnesium L-Threonate (Magtein) Supplements (2026)

Super Achiever Magnesium Glycinate

7 picks — ranked by our 50/50 methodology

Life Extension Neuro-Mag Magnesium L-Threonate

Momentous Magnesium L-Threonate (Magtein)

Double Wood Magnesium L-Threonate (Magtein)

Jarrow Formulas MagMind (Magtein)

NOW Foods Magtein Magnesium L-Threonate

Source Naturals Magtein Magnesium L-Threonate

Pure North Naturals Magnesium L-Threonate

How we ranked these seven

The bottom line

Every claim ranked above traces back to one of these

Enhancement of learning and memory by elevating brain magnesium

Efficacy and safety of MMFS-01, a synapse density enhancer, for treating cognitive impairment in older adults: a randomized, double-blind, placebo-controlled trial

Effects of elevation of brain magnesium on fear conditioning, fear extinction, and synaptic plasticity

A magtein, magnesium L-threonate, based formula improves cognitive ability in healthy older adults: a 12-week randomized, double-blind, placebo-controlled trial

Suboptimal magnesium status in the United States: are the health consequences underestimated?

More Magnesium Glycinate guides

Stop reading. Start leveling.