Chemistry Labs L Carnitine (30 Servings) L carnitine ameliorated fasting induced fatigue, hunger, and metabolic abnormalities in patients with metabolic syndrome: a randomized controlled study Nutrition Journal Springer Nature Link Carnitine: the claims and why it may not work 6 Benefits of L Carnitine Injections MedHealth 360 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.