Ester-C®* is a patented, mineralized form of vitamin C. Ascorbic acid, the vitamin C we are most familiar with, passes through the horse's gut and is excreted too rapidly.

Vitamin C can irritate the lining of the digestive tract and at the higher dosage needed to help the joints will cause the formation of crystals in the urinary tract and can cause ulcers or diarrhea. Ester-C® has a neutral pH, which means it will not upset your horse's stomach or cause ulcers. In addition, because of its patented formula, Ester-C® is four times more absorbable than regular vitamin C. The primary role of Ester-C® in the formation of collagen, the intercellular cement that is the major stress-bearing component of bones, cartilage, teeth, tendons, and ligaments. Ester-C® plays an important role in the cross-linking of collagen; acts as a signaling agent to favor connective tissue synthesis; and acts as an antioxidant to scavenge free radicals. Although horses manufacture their own ascorbic acid, evidence supports the theory that this may not be enough to counter the athletic demands placed upon them.

Click here to review a research article on COPD * Manufactured under U.S. Patent No. 4,822,816. Other foreign patents pending. E and Ester-C are licensed trademarks of the Inter-Cal Corporation