Acetyl-L-Carnitine 500mg x 100 CapsulesDescription The acetyl derivative of L carnitine. Like L carnitine, acetyl L carnitine is involved in the metabolism of protein, carbohydrates and fats, as well as the conversion of fats into energy and triglyceride metabolism. Acetyl L carnitine crosses the blood brain barrier more readily than L carnitine, has antioxidant properties, and because it has an affinity for nerve cells, may especially provide antioxidant protection for neuronal integrity.