Ingredient Research

Magtein® Magnesium L-Threonate

Clinical Research, Mechanism & Applications

MagnesiumCognitionMemorySleepBrain Health

At a Glance

Ingredient Form

Magnesium L-threonate

Primary Research Areas

Cognition • Memory • Sleep

Research Level

Clinical + Preclinical Evidence

Distinctive Characteristic

Form developed to support brain magnesium

What Is Magnesium L-Threonate?

Magtein is magnesium bound to L-threonate, a form developed specifically to support brain magnesium levels. Magnesium is a cofactor in hundreds of enzymatic reactions, but most forms — oxide, citrate, glycinate — are not designed around brain delivery. Research in animal models suggested L-threonate could support elevation of magnesium in the cerebrospinal fluid, motivating human studies on cognition, memory, working memory, sleep, and daytime function. Unlike magnesium oxide (high elemental magnesium but poorly absorbed) or magnesium citrate (well absorbed but not brain-targeted), L-threonate is positioned for neurological and cognitive applications. Wellnex selects magnesium L-threonate when the formula objective is cognitive, sleep, or stress support rather than general magnesium repletion.

Magnesium L-Threonate vs Other Forms of Magnesium

Magnesium forms differ in bioavailability, tolerability, and intended application. Magnesium oxide has high elemental magnesium but low absorption. Magnesium citrate is well absorbed and commonly used for repletion and bowel regularity. Magnesium glycinate (bisglycinate) is well tolerated and used for relaxation and sleep support. Magnesium L-threonate was developed around brain delivery: preclinical research suggested it raises CSF magnesium, and human trials have examined cognition, memory, and sleep outcomes. No single form is superior for every application; form selection depends on the clinical objective. For neurological and cognitive formulas, L-threonate is the form with the most targeted research base.

Research Highlights

Human RCT + Preclinical

Cognition & Memory

Magnesium L-threonate is studied for working memory, cognitive performance, and cognitive aging.

Human Research

Sleep & Daytime Function

Human studies examine sleep quality and next-day functioning with magnesium L-threonate.

Mechanistic/Preclinical

Brain Magnesium

Animal research characterized effects on brain magnesium and synaptic function.

Evidence Distinction

Research labeled “Branded Ingredient Study” used the named branded material. Research labeled “Ingredient-Level Research” studied the nutrient or ingredient class generally and is informative without implying the same exact material was used. We do not imply a study used a branded ingredient unless the publication identifies it.

PubMed Research

RCTBranded Ingredient StudyStrong

Efficacy and Safety of MMFS-01, a Synapse Density Enhancer, for Treating Cognitive Impairment in Older Adults: A Randomized, Double-Blind, Placebo-Controlled Trial

Liu G, et al.

Journal of Alzheimer's Disease, 2016

The Magtein-based MMFS-01 formulation improved cognitive outcomes in older adults with cognitive impairment in a 12-week RCT.

Population:Older adults with cognitive impairment

Participants:—

Duration:12 weeks

Dose:MMFS-01 (magnesium L-threonate + vitamins C & D) vs placebo

Primary Area:Cognitive function across multiple domains

Key Finding

MMFS-01, a magnesium L-threonate–based formulation, improved performance across multiple cognitive domains over 12 weeks in older adults with cognitive impairment.

View on PubMed

RCTBranded Ingredient StudyStrong

A Magtein®, Magnesium L-Threonate, -Based Formula Improves Brain Cognitive Functions in Healthy Chinese Adults

Zhang C, et al.

Nutrients, 2022

A Magtein® magnesium L-threonate + phosphatidylserine formula improved memory and cognition in 109 healthy Chinese adults over 30 days.

Population:Healthy adults 18–65 y

Participants:109

Duration:30 days

Dose:Magtein®PS (Mg L-threonate + phosphatidylserine + vitamins C & D) 2 g/day vs placebo

Primary Area:Clinical Memory Test (memory & cognition)

Key Finding

Magtein®PS significantly improved all Clinical Memory Test subcategories and the overall memory quotient versus placebo, with greater improvement in older participants.

View on PubMed

RCTBranded Ingredient StudyStrong

The effects of magnesium L-threonate (Magtein®) on cognitive performance, cognitive age, sleep quality, and selected physiological indicators in adults: a randomized controlled trial

Lopresti AL, Smith SJ

Frontiers in Nutrition, 2025

In a 6-week RCT, Magtein® improved overall cognition, working memory, reaction time, and autonomic balance (HR/HRV) in adults with dissatisfied sleep.

Population:Adults 18–45 y with self-reported dissatisfied sleep

Participants:100

Duration:6 weeks

Dose:Magtein® 2 g/day vs placebo

Primary Area:Cognition (NIH Toolbox), sleep, heart rate, HRV

Key Finding

Magtein® improved overall cognition (NIH total composite), working/episodic memory, reaction time, and autonomic balance (lower resting HR, higher HRV), and reduced estimated brain cognitive age; subjective sleep-related impairment improved in a subset.

View on PubMed

Frequently Asked Questions

What is magnesium L-threonate?

Magnesium bound to L-threonate, a form developed specifically to support brain magnesium levels.

Does magnesium L-threonate cross the blood-brain barrier?

Preclinical research suggested L-threonate supports elevation of magnesium in cerebrospinal fluid; the clinical significance is an active area of study.

What is the difference between magnesium glycinate and magnesium L-threonate?

Magnesium glycinate emphasizes tolerability and general relaxation; magnesium L-threonate was developed for cognitive and brain-focused applications.

What is Magtein?

Magtein is a branded magnesium L-threonate ingredient used in cognitive and sleep-focused formulas.

What is the best magnesium for brain health?

No form is best overall. Magnesium L-threonate has the most brain-targeted research; selection depends on the formula goal.

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FDA Disclaimer

These statements have not been evaluated by the Food and Drug Administration. The ingredients and research summarized on this page are provided for educational purposes only and are not intended to diagnose, treat, cure, or prevent any disease. Research findings reflect the published studies cited and do not represent claims about any Wellnex Solutions product. Individual results vary. Always consult a qualified healthcare professional before beginning any supplement regimen.