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 Supplement stack for ADHD focus and mood improvement PDF) Acetyl L Carnitine as an Adjunctive Therapy in the Treatment of Attention Deficit Hyperactivity Disorder in Children and Adolescents: A Placebo Controlled Trial Acetyl L Carnitine 1000mg Acetyl L Carnitine 500 mg