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Acetyl L-Carnitine supports memory and cognition*
Acetyl-L-carnitine (ALC) is an amino acid which participates in cellular energy production, a process especially important in neurons. Studies of those with memory problems have reported modest advantages over a range of memory tests for ALC supplement groups compared to placebo.

In one double-blind, placebo-controlled trial, patients with mild dementia and vascular dementia received ALC in doses from 2,250 to 3,000 mg per day or placebo for 12 weeks. Each patient’s state was assessed with a battery of neuropsychological tests. The positive treatment effects of ALC were 2.8 times higher than in placebo-treated individuals. Studies demonstrated 1-2 gram daily doses of ALC for improvement in long-term memory performance. Lower doses of ALC may have some preventative attributes for cognitive health.

References:
Acetyl-L-Carnitine Monograph. Alternative Medicine Review 2010; 15C1J:76-83.  

Gavrilova SI, Kalyn IaB, Kolykhalov IV, Roshchina IF, Selezneva ND. Acetyl-L-carnitine (carnicetine) in the treatment of early stages of Alzheimer's disease and vascular dementia. Zh Nevrol Psikhiatr Im S S Korsakova. 2011;111(9):16-22.
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