Acetyl L-Carnitine by Twinlab Potency 500 mg Size 30 Caps Retail Price $31.95 Our Price $22.32 SKU # TW0363 Product ID # 2932 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.