L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians Multi Collagen Advanced Lean (30 Servings) 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 500 mg, 100 capsules Life Extension Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get Doctor's Best Acetyl L Carnitine, 500 mg, 60 Veggie Caps