Magnesium form

Magnesium L-Threonate

Last reviewed September 28, 2026Part of Magnesium
In short

A newer, premium-priced form marketed for brain health. It contains a low percentage of elemental magnesium, and human research is early.

At a glance

Compound
General reference
Magnesium salt of L-threonic acid
Approx. elemental magnesium
SuppScout calculation
~8% by weight
Typical formats
General reference
Capsules, powders
Form-specific research
Published research
Early and limited in humans
Price
General reference
Usually highest cost per 100 mg elemental

SuppScout calculation About 8% elemental magnesium by weight.

About magnesium l-threonate

What it is

Magnesium L-threonate was developed to raise magnesium in the brain based on animal research. Because the threonate portion is heavy, a typical daily serving provides a relatively small amount of elemental magnesium.

What the research says

Human studies are few and small. When comparing products, note how little elemental magnesium each serving provides and what that means for cost per 100 mg.

Magnesium L-Threonate products

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Other magnesium forms

Sources & references

  1. Magnesium: Fact Sheet for Health Professionals. NIH Office of Dietary Supplements. ods.od.nih.govGovernment

SuppScout links to primary and authoritative sources wherever possible. See our editorial policy for how sources are selected and how corrections are handled.

This page is educational and is not medical advice. Talk to a healthcare professional before starting a supplement, especially if you have a medical condition, take medications, or are pregnant or breastfeeding.