Magnesium L-threonate
A few small trials, the first run by the maker.
Grade B: Some human proof
Small, early or mixed results in people.
The grade is for the use people talk about, not for every use. Filed under: Brain support, over the counter.
How it works
A form of magnesium made to reach the brain more easily.
How it was given in studies
By mouth. In the trials people swallowed it as a capsule, tablet, powder or drink.
This is what the studies did. It is not a how-to.
What studies saw
A 12-week trial of 44 older adults with thinking problems, run by the maker, reported better thinking scores. A 2026 trial in 100 adults with poor sleep found a better overall thinking score. People rated some sleep problems as better, but a sleep tracker showed no change.
The trade-off
The first trial was run by the maker. Costs more than other forms of magnesium.
When it showed up, in studies
Better thinking scores after 6 to 12 weeks in small trials.
Sources
Put this grade on your site
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Keep going
We show what studies found. We never tell you what to take. Doses vary by study. Check the sources and talk to a doctor.