L-CARNITINE + BIOPERINE from Weider . L-Carnitine is the amino acid responsible for the transport of fatty acids accumulated in fat deposits to the mitochondria, where they are oxidized for energy. There are two types of carnitine, L-Carnitine and D-Carnitine, but only the first is biologically effective. The body can synthesize L-Carnitine as well as obtain it from foods of animal origin, but the amounts obtained by these two routes are insufficient to promote the mobilization of fats, hence its supplementation is necessary. L-Carnitine in capsules together with the performance of aerobic exercise, can before an increase in the energy demand of the body, favor the mobilization of fats for energy. The formula is completed with black pepper extract (Bioperine), which has the ability to increase the bioavailability of the rest of the ingredients and improve results.