Alpha-GPC
Small trials. One large study raised a stroke question.
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
Delivers choline to the brain to make acetylcholine, a memory signal.
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
Small trials in young men: a better score on one attention test an hour after a dose, and more jump power or leg strength after about a week. Other measures did not move. In South Korea it is a prescription drug widely used for dementia symptoms.
The trade-off
A Korean records study of about 12 million people linked use to a higher 10-year stroke risk. That kind of study cannot prove cause.
When it showed up, in studies
One small trial: a better score on one attention test an hour after a dose.
More jump power or leg strength after about a week, 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.