From the Manufacturer's label
NOW® L-Carnitine Liquid (Citrus Flavor) provides all of the extensive benefits of Carnitine in a highly absorbable liquid form. L-Carnitine is a non-essential amino acid that helps to maintain overall good health by facilitating the transfer of fatty acid groups into the mitochondrial membrane for cellular energy production.* It naturally occurs in red meat and other animal-source foods, but NOW® Foods recommends supplementation to obtain optimal levels of this excellent amino acid. Now® Foods L-Carnitine is the purest form, clinically tested, and vegetarian (non-animal sourced).