Acetyl L-Carnitine by Twinlab Potency 500 mg Size 120 caps Retail Price $49.95 Our Price $34.92 SKU # TW1277 Product ID # 29605 You Save 31% Buy Now! Description of Acetyl L-Carnitine Each capsule provides 500 mg of Acetyl L-Carnitine. As an Amino Acid, Acetyl L-Carnitine acts as one of the building blocks for protein.