Supplements for Depression: A Psychiatrist's Perspective SURUCHI CHANDRA M.D. Depression Linked to Low Levels of Acetyl L Carnitine in Psychiatry Study L Carnitine Linus Pauling Institute Oregon State University A note about food and mood. I've spoken in YouTube videos before about the large effect my diet experiments have had my on mental function and wellbeing (depression, or its absence). Over Acetyl l carnitine deficiency in patients with major depressive disorder PNAS