Features the same levels of active ingredients as cosequin optimized plus high purity MSM. Msm is an organic source of sulfur, a compound used by cartilage. Cosequin Optimized With Msm For Horses Contains 10, 000 mg Msm (Per 2 Scoops). This offers a convenient, cost-effective way to supplement additional MSM which some veterinarians suggest to help manage joint health