The Rockefeller University Lack of a single molecule may indicate severe and treatment resistant depression Detailed information of studies on carnitine and depression in human. Download Scientific Diagram Detailed information of studies on carnitine and depression in human. Download Scientific Diagram People who live with depression have low blood levels of a specific molecule, new medical research has revealed. It's called acetyl L carnitine, and those with particularly severe, treatment resistant or childhood onset depression were L Carnitine Linus Pauling Institute Oregon State University Exploring Zn(II) Acetyl l carnitine complex for simultaneous management of depression, chronic pain, and neuroprotection ScienceDirect