Legacy supports healthy joint function for senior horses 15 years or older. Contains 5,000 mg Yucca, 2,500 mg MSM, 1,800 mg Glucosamine, 1,000 mg Calcium Ascorbate as Ester-C, 1,000 I.U. Vitamin E and 600 mg Chondroitin Sulfate. Administer 2 ounces per day.