TECHNICAL AND BIBLIOGRAPHIC INFORMATIONS Carnitina Extra is a food supplement of Carnitine with a high concentration and it is suggested in endurance and ultra-endurance sport. The product is enhanced thanks to vitamin B12 and Zinc. Carnitine plays an important physiological role as a fatty acid carrier in energy-yielding metabolism. On the biochemical level, carnitine facilitates the transport of long-chain fatty acids into mitochondria, where they are oxidized to produce energy. In the cell, carnitine is involved in a complicated mechanism called “carnitine acyl-CoA transferase”: it maintains a balanced acetyl CoA/CoA ratio and assists the conversion of pyruvate and lactate to Acetyl CoA. Moreover, carnitine carries out an indirect, anti-oxidant action on high metabolism cells, such as cardiac and muscle cells. Vitamin B12 contributes to normal energy-yielding metabolism and to the reduction of tiredness and fatigue, while zinc contributes to normal metabolism of fatty acids.