Equine America Vitamin C Powder. Vitamin C is an important antioxidant, although horses can synthesise their own Vitamin C, there are occasions when requirements increase, such as intense exercise or their ability to synthesise their own Vitamin C may be compromised or reduced. Targeted nutrition with Vitamin C 2000 powder can help to support the horse especially during times of stress, such as illness or frequent travel, when they may need an additional dietary source of Vitamin C to meet their increased requirements. All ingredients are selected to ensure they are fully compliant with the Rules of Racing and the FEI Guidelines for Clean Sport. Composition Dehydrated Alfalfa, Dextrose, Calcium Carbonate, Rapeseed Oil. Analytical Constituents Crude Protein 6.7% Crude Ash 38.2% Crude Oil 1.7% Sodium 5.5% Crude Fibre 11.2% Calcium 7.0%