L carnitine is an amino acid that is produced in your body that helps the body turn fat into energy. Carnitine is found in nearly all cells of the body and researchers have When to take L carnitine: Dosage, forms, and side effects Acetyl L Carnitine Superior Supplement Products Science First Designs for Health L Carnitine's Effect on the Biomarkers of Metabolic Syndrome: A Systematic Review and Meta Analysis of Randomized Controlled Trials