PHARMACEUTICAL GRADE ACETYL-L-CARNITINE Acetyl L-Carnitine is a modified amino acid that supports cellular energy production by assisting in the transport of fat into the mitochondria where it is oxidized and converted into ATP (chemical energy for the cell). Acetyl L-Carnitine is a highly bioavailable form of L-Carnitine which helps to maintain healthy cellular energy metabolism and supports brain function. Acetyl L-Carnitine assists the transport of fat into the mitochondria, where it is oxidized and coverted to ATP.