L Theanine Benefits, Uses, Side Effects, Dosage, Foods Dr. Axe L Theanine Benefits, Uses, Side Effects, Dosage, Foods Dr. Axe Acetyl L Carnitine Force Factor Instead of relying on ADHD medications, here are some natural alternatives. Diet: Avoid sugary foods and artificial dyes & preservatives Eat foods containing L tyrosine (this is the amino acid Acetyl L Carnitine, 120 Veggie Caps (500 mg per Cap)