Equine Joint Guard - Joint Supplement for Horses Features 100 mg of Hyaluronic Acid! Also includes therapeutic levels of Chondroitin, MSM and Glucosamine Only the highest quality (pharmaceutical-grade) ingredients Made in Oregon Formulated by Certified Equine Nutritionists Orders placed with Amazon.com are fulfilled directly by the manufacturer A relative newcomer to joint nutraceuticals, hyaluronic acid helps bring lubrication back to joints. MSM, a source of sulfur which also has anti-inflammatory properties Methionine, cartilage and the connective tissue of the body contain methionine and other sulfur amino acids. Methionine is an amino acid and an excellent source of sulfur. <span class="a-text-bold">Yeast</span> has a beneficial effect on digestion and helps improve availability of nutraceuticals. <span class="a-text-bold">Vitamin C and Vitamin E</span> antioxidants helps control free radicals and the damage done in areas of inflammation.