to determine the possible beneficial and/or toxic effects or oral carnitine isomers and the carnitine precursor , gamma-butyrobetaine , in the rat , groups of male , weanling rats were fed a carnitine-free diet ( control ) supplemented with various amounts of l-carnitine , d-carnitine , dl-carnitine or gamma-butyrobetaine for 32 days .
C0087163
l-carnitine
C0007258
carnitine