TRM Vitamin C 10% 1kgVITAMIN C 10% is a complementary feed for horses. Under normal circumstances a horse produces adequate supplies of Vitamin C. However natural production may not be sufficient during the following circumstances and supplementation can be beneficial. Horses in very hard training where additional antioxidant support is required. During periods of stress. In very hot conditions. In young and old horses to nutritionally support collagen synthesis.