Nu-CatT Senior incorporates important nutrients necessary to the health of senior cats, but not always found in cat food or ordinary supplements. The base of this advanced formula is our feline multivitamin, Nu-CatT, with double the amount of enteric coated digestive enzymes and we've added Phosphatidylserine, Alpha lipoic acid, L-Glutamine, CoQ10, Tyrosine, Grape Seed Extract, Milk Thistle Extract, EPA, DMG, and Bilbery Extract to enhance cardiovascular, liver, cognitive, eye, and digestive functions as well as maintain the physical and mental well-being of senior cats. Cats find Nu-CatT Senior's fish flavor very palatable.