L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link Acetyl L Carnitine Allergy: Symptoms and Treatment Options (2026) Wyndly L Carnitine vs L Arginine: Understanding Their Differences and Benefit Fitness Health If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy.