Yamamoto® Nutrition Acetyl L-CARNITINE is a dietary supplement with 1000 mg of active ingredient per capsule. Acetyl L-Carnitine (ALC) is the acetylated form of L-Carnitine, which has slightly different properties, and is one of the most popular forms of Carnitine. During exercise a large part of L-Carnitine is converted into ALC within mitochondria by the enzyme Carnitine O-acetyltransferase. Acetyl L-CARNITINE is a dietary supplement recommended for active adults, based on Carnitine (from Acetyl L-Carnitine), a physiological carrier of fatty acids.