Now Foods Acetyl L Carnitine 500 mg 200 vegetarian capsules Miss Lamonique THORNE Acetyl L Carnitine 500 mg Supports Brain Function & Healthy Nerve Sensations in The Hands & Feet* Gluten, Dairy & Soy Free 60 ProCaps Laboratories Memory & Brain + ALC 400 Kit L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. Frontiers Age and APOE affect L carnitine system metabolites in the brain in the APOE TR model Amazon.com: Acetyl L Carnitine 1,000mg Per Serving, 150 Capsules (ALCAR for Brain Function Support, Memory, Attention, and Stamina) Acetyl L Carnitine that is Third Party Tested by Double Wood : Everything Else