Could a mitochondrial metabolite known as acetyl L carnitine (LAC) yield a new biomarker for depression and potential new therapies? Dr. Carla Nasca, an @nyugrossman assistant professor of psychiatry and of neuroscience and physiology, Acetyl L Carnitine 500mg Cognitive Support Carlson Alterations in acylcarnitines, amines, and lipids inform about the mechanism of action of citalopram escitalopram in major depression Translational Psychiatry Study links depression to low blood levels of acetyl L carnitine