Plasma acetyl l carnitine and l carnitine in major depressive episodes: a casecontrol study before and after treatment Psychological Medicine Cambridge Core Frontiers L Carnitine and Acetyl L Carnitine: Potential Novel Biomarkers for Major Depressive Disorder Novel Approaches to Bipolar: What Worked, and What Did Not, in 2019 Psychiatric Times Myriad of implications of acetyl l carnitine deficits in depression PNAS