Olympian Labs, L-Carnitine, 500mg, 60 CapsProduct Description Carnitine is an essential nutrient first found in muscle extracts in 1905. Later, in 1927, the chemical structure of L Carnitine was confirmed. This vitamin like nutrient, also known as Vitamin BT wasnt available commercially until the 1980s. L Carnitines main responsibility is that of energy production and proper fat metabolism. L Carnitine is found most often in meat and meat extract. In the human body, L Carnitine is found