(Med-Vet Pharmaceuticals) Matrix 5 + H/A Pellets help support healthy joint function in horses. Each 2 oz. scoop provides 125 mg hyaluronic acid, 10,000 mg glucosamine sulfate, 10,000 mg MSM, and 2500 mg chondroitin sulfate, plus yucca extract, Ester-C, vitamins, and minerals. Feed 3 oz. daily during heavy stress or working conditions. Feed 1 oz. twice daily for maintenance. Pellets.