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 Pantothenic Acid Linus Pauling Institute Oregon State University Is Depression Really Caused by a "Chemical Imbalance"? New Landmark Study Says No. A comprehensive review led by researchers at University College London (UCL) has found no solid scientific evidence that depression Low Acetyl L Carnitine Levels May Be Linked to Depression Psychiatric News Conceptual foundations of acetylcarnitine supplementation in neuropsychiatric long COVID syndrome: a narrative review European Archives of Psychiatry and Clinical Neuroscience Springer Nature Link