← NUTRITIONSituational
Acetyl-L-Carnitine (ALCAR)
A carnitine form that crosses into the brain — marketed as a nootropic, with mostly thin human evidence.
An acetylated form of L-carnitine that reaches the brain, sold for focus, mood and 'energy' rather than for training.
Some early evidence in older adults and specific clinical situations, but little to support the cognitive or fat-loss claims in healthy younger people. Treat it as experimental.
- !Evidence for everyday cognitive benefit in healthy people is weak.
- !Can cause restlessness or GI upset; start low.
Note:General information, not medical advice. Supplements interact with medications and conditions — check with your doctor before starting anything, especially if you're pregnant, nursing or managing a health condition.