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 L Carnitine 1000 mg Acetyl L Carnitine Mark Hyman, MD In the double blind, placebo controlled, double crossover trial published in Prostaglandins, Leukotrienes & Essential Fatty Acids, boys diagnosed with ADHD were given acetyl L carnitine at 100 mg per kg of body weight per day, divided Meta analysis claims effectiveness of multi nutrient supplements in treating ADHD, but reports inconsistent results and has methodological shortcomings PDF) Acetyl L carnitine reduces impulsive behaviour in adolescent rats