Acetyl-L-Carnitine is similar in form to the amino acid L-Carnitine and also has some similar functions, such as being involved in the metabolism of food into energy. However, Acetyl-L-Carnitine is absorbed into the bloodstream more efficiently than L-Carnitine and more importantly, Acetyl-L-Carnitine passes more effectively through cell membranes and is utilized more efficiently in the mitochondria of the cell. Pack size & Dosage Info Reflex Acetyl-L-Carnitine is available in the following pack sizes. 90 capsules: 30 - 90 Day supply depending on dosage. Dosage Directions for use: Take 1 to 3 capsules daily, or as prescribed by a health practitioner.