L-Carnitine is one of the highest grade L-Carnitine's on the market. Acetyl L-Carnitine is a naturally occurring amino acid that promotes the transportation of free fatty acids into the mitochondria (core of the cells), where they are burned off as energy. L-Carnitine also assists muscle recovery after strenuous exercise and promotes optimal heart and brain function. BlackBelt Proteinwanted to ensure that our L-Carnitine pharmaceutical quality was maintained, so this product has not been artificially flavoured or coloured. L-Carnitine is stack-safe.