Acetyl-l-carnitine is the acetylated form of l-carnitine, and the two compounds share similar energy and metabolism promoting properties. Found naturally in the body, acetyl-l-carnitine supports the availability of acetyl-CoA, an important energy generating metabolite. In addition, it supports healthy mitochondrial function and cell membrane stability. A multicenter trial of 481 volunteers indicated memory, behavioral and emotional support with acetyl-l-carnitine supplementation. In an evaluation of 28 elderly individuals using acetyl-l-carnitine or placebo, the supplemented group experienced enhanced emotional well-being.