DOGZYMES CRAN TRI C is a product to offer vitamin C in a form closely matching vitamin C from whole food. We blend 3 forms of vitamin C in raw cranberry powder which provides a whole food base to fully complete all vitamin C's components that only whole food delivers. There is no recommended daily dose of vitamin C for dogs as established by the NRC, but Cran-Tri-C delivers real vitamin C in the most natural and best utilized form for absorption by cells. Whether for bone health, antioxidants to protect cells from cancer, reduce inflammation, prevent oxidation damage, provide immune support, optimize organ health, and for any part of the body, vitamin C is important. Vitamin C is exciting researchers in recent studies when compared to several new cancer drugs with more trials coming. The cranberry component is excellent for deterring and eliminating urinary tract infections. 150 mg. per 1/4 teaspoon. Easy to use by just mixing in food. Mother Nature's way.