Acetyl L Carnitine, 500 mg, 120 Vegetarian Capsules Amino acids L Tyrosine is the raw building block for your dopamine. It is the material your brain needs to manufacture focus. Without it, you are trying to build a bridge with no Acetyl L Carnitine 800 mg & Alpha Lipoic Acid 400 mg, 90 Quick Release Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health Acetyl L Carnitine 500 mg