The ProDen PlaqueOff Powder for cats is a 100% natural pet food supplement containing the natural kelp ingredient A.N ProDen shown in clinical trials to help reduce plaque and tartar and to help improve bad breath. The results are usually seen between 3 to 8 weeks, with continued use. Sprinkle the powder over the cats ordinary food once a day with the supplied scoop. The Powder Cat has a tasty formula containing brewers yeast specially made for cats- your cat wont be able to resist it! A 40g bottle can last up to roughly 4 months.