PDF) Efficacy and Safety of Acetyl L Carnitine and Agmatine Sulfate Compared to Escitalopram in Major Depressive Disorder: A Double Blind Study Study links depression to low blood levels of acetyl L carnitine 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 L Carnitine Linus Pauling Institute Oregon State University