Short chain carnitines in adolescent major depressive disorder: Associations and biomarker potential ScienceDirect Acetyl L carnitine protects against LPS induced depression via PPAR induced inhibition of NF B NLRP3 pathway What is Acetyl L Carnitine? Depression linked to low levels of brain molecule Hope For Depression 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,