Has the same levels of active ingredients as cosequin optimized plus high purity MSM (methylsulfonylmethane). 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). N. For those wishing to additionally supplement MSM, this offers a convenient, cost-effective way to administer. Some veterinarians suggest using MSM to help manage joint health. Size is 1400 Grams. Dimensions are 5 X 5 X 7.75 UPC Code = 755970404036