People who live with depression have low blood levels of a specific molecule, new medical research has revealed. It's called acetyl L carnitine, and those with particularly severe, treatment resistant or childhood onset depression were L Carnitine Liquid Liquid L Carnitine L Carnitine 3000 mg NOW ProCaps Laboratories Acetyl L Carnitine 400 Benefits of Acetyl L Carnitine Simply Supplements PCOS Nutrition Center L Carnitine (120 Capsules) PCOS Nutrition Center Frontiers Discovery and validation of acetyl L carnitine in serum for diagnosis of major depressive disorder and remission status through metabolomic approach