Dietary Supplement. Antioxidant Protection for the Brain*. Pharmaceutical Grade, Stabilized. BIOSINT Carnitines™. Suitable for vegetarians / vegans Acetyl-L-Carnitine is an amino acid found in high concentration in human brain, nerve, heart, liver and sperm cells. Acetyl L-Carnitine supports energy production via the metabolism of fatty acids to yield the universal energy molecule ATP.* As an antioxidant, Acetyl-L-Carnitine helps to protect neurons from damage caused by superoxide radicals.* Biosint™ is a trademark of Sigma-Tau Industries, S.p.A. Biosint™ L-Carnitine is manufactured by Sigma-Tau Industries, S.p.A. , the pioneer in L-Carnitine.