Carnitine Deficiency MD Searchlight Acetyl L carnitine is a white crystalline solid that resembles snow. It has a mild odor similar to vinegar. It is a metabolite of L carnitine, derived from the amino acid L lysine in a series Frontiers Gut Metabolite Trimethylamine N Oxide in Atherosclerosis: From Mechanism to Therapy L Carnitine Benefits for Male Erectile Dysfunction Frontiers Role of Carnitine in Non alcoholic Fatty Liver Disease and Other Related Diseases: An Update L Carnitine: Benefits, Uses, and Side Effects Lifespan Research Institute