Cosequin plays an important role in maintaining optimal joint function. The superior quality ingredients in our patented product provide the raw materials that are essential for the synthesis of the articular cartilage matrix and the major components of synovial fluid, while inhibiting the enzymes that break down cartilage. The effect of each ingredient performing its primary function concurrently is what makes Cosequin unique and a broad-spectrum cartilage matrix enhancer. Why does an optimized formula now contain MSM? MSM is an organic source of sulfur, a compound used by cartilage. Some veterinarians suggest using MSM to help manage joint health. Cosequin Optimized with MSM for horses contains 10,000 mg MSM (2 scoops). For those wishing to additionally supplement MSM, Cosequin Optimized with MSM offers a convenient, cost-effective way to administer MSM along with the proven ingredients in Cosequin Optimized. What is an Optimized Formula and should my horse be given this? Cosequin® Optimized is the original researched formula now with higher levels of active ingredients in a tasty flavored powder. Current research suggests that horses under high stress or heavy activity may need higher levels of glucosamine hydrochloride. Cosequin Optimized provides 14,400 mg of glucosamine hydrochloride (based on 2 scoops per day) vs. Cosequin Original 10,800 mg (based on 6 scoops per day). I am currently giving my horse Cosequin Original Formula. Should I switch to the Optimized formula? If you are happy with the results you have seen using Cosequin original then there is no reason to change. If your horse has an intense competition schedule you may want to switch to Cosequin Optimized for the increased levels of active ingredients.