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 Acetyl L Carnitine as an Adjunctive Therapy in the Treatment of Attention Deficit Hyperactivity Disorder in Children and Adolescents: A Placebo Controlled Trial Child Psychiatry & Human Development Springer Nature Link Double Wood Supplements Acetyl L Carnitine (150 Capsules, 75 Day Supply) 1,000mg ALCAR for Brain Function Support, Memory, Attention, and Stamina L Carnitine ELITE BURN supplements for adhd Ask Huberman Lab