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Nutricost Magnesium L-Threonate
SPECIMEN #NUTRICOS
Verified
MineralsNutricost

Magnesium L-Threonate

The brain magnesium. MIT-developed Magtein is the only form shown to cross the blood-brain barrier. Clinical studies show memory improvement in older adults. Only 144mg elemental magnesium though, so add glycinate for body needs.

7.8/10
VERY GOOD

The brain magnesium. Magtein (magnesium L-threonate) is the only form shown to cross the blood-brain barrier and increase brain magnesium levels. Nutricost delivers it at the studied dose.

2 ingredientsCapsules30 servings
We'd recommend this
Evidence
8.0
Dosing
8.0
Synergy
4.0
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Whenevening

Supports sleep quality and relaxation.

Foodwith or without food

Well-tolerated either way.

SafetyAll clear
ResearchLimited evidence

MIT-developed. Clinical trials show brain magnesium increase and cognitive improvement. Smaller evidence base than glycinate.

What We Like

  • Magtein is the only form clinically shown to increase brain magnesium.
  • 2000mg matches the dose used in clinical trials.
  • Nutricost's pricing makes this accessible.
  • Studies show memory improvement in older adults.

Watch Out For

  • Only 144mg elemental magnesium (low for general mag needs).
  • Need 3 capsules per serving.
  • More expensive than other magnesium forms.
  • Research is promising but still limited compared to glycinate.

What We Analyzed

Magnesium L-Threonate Supplement Facts

Verified Supplement Facts

Every dose checked against clinical research

We analyzed the actual supplement facts panel for this product. Every ingredient dose below was cross-referenced with published clinical trials to determine if it matches what studies actually use.

2 ingredients analyzed1 underdosed

Source: Official product page

Ingredient Breakdown

1 underdosed
Clinical Adequate Underdosed Overdosed|Bar = % of clinical dose
IngredientDoseStatusvs. Clinical
Magnesium L-Threonate10.0

Magtein

2000 mgOVERDOSED
500%
2000 mg

of 400mg

OVERDOSED
500%
Magnesium10.0

elemental from L-Threonate

144 mgUNDERDOSED
36%
144 mg

of 400mg

UNDERDOSED
36%
In our database (click to learn more) Not yet reviewed

Our Analysis

Best For

People with cognitive concerns.Those wanting magnesium specifically for brain function.Older adults with memory concerns.People with sleep difficulties.

Skip This If

Those needing high-dose elemental magnesium.

Time to Feel

2-4 weeks for sleep. 8-12 weeks for cognitive benefits.

Value

EXCELLENT

How to take: No cycling needed.

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