One AC is a nutritional supplement developed specifically for non-sweating (anhidrotic) horses. It supports the production and storage of dopamine in the liver to help enhance the function of the horse’s cardivascular and respiratory systems. Heavy training should be restricted for about 10 to 14 days until the animal starts to sweat. The patented formula is strictly nutritional and does not test, so it is safe for use in all classes and breeds of horses, including pregnant and lactating mares, performance horses, and stallions. It has no known side effects when used as directed. Ingredients: L-tyrosine, choline bitartrate, niacin, pyrodoxine HCl and D-calcium pantothenate.