Unique for the cat's metabolism is the inability to convert carotenoids to vitamin A; lack of ability to synthesise adequate vitamin D; inability to synthesise niacin from tryptophan, lack of ability to synthesise cysteine, citrulline, and methionine; and an intolerance to glutamic acid.[fifteen] [ninety] Linoleic acid can't be transformed by https://www.petskyonline.com/