Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota When to take L carnitine: Dosage, forms, and side effects Most people talk about carnitine like it is one supplement. It is not. Acetyl L carnitine and L carnitine L tartrate do different jobs, and picking the wrong one for the wrong goal is where people Frontiers L carnitine prevents lenvatinib induced muscle toxicity without impairment of the anti angiogenic efficacy Role of carnitine in disease Nutrition & Metabolism Springer Nature Link