Conclusion. For most healthy dogs, the endogenous production of vitamin C is adequate, and routine supplementation is unnecessary. However, in situations involving stress, illness, aging, joint ...

Many people take dietary supplements or vitamins. And increasingly, they’re likely to give them to their pets, too. As many as a third of U.S. dogs and cats may receive vitamins or supplements.

Dr. Maizes answers the question: 'Take More Vitamin C For Cold And Flu?' Jan. 13, 2010 -- Question: Should I take more vitamin C if I feel like I'm coming down with a cold or throughout cold and ...