The Safest and Fastest Way of Helping You Becoming Slim & Good-looking! Description:L-Carnitine belongs to the group named Amino Acid. Our body produces it to maintain basic metabolism. It is important in fatty acids burning and transforming them into energy.The L-Carnitine Injections is a weight loss treatment that helps the body turn fat into energy.some sportsmen use this L-carnitine to enhance their performance and tone up their muscles.And other beauty benefits.