Bluebonnet's MSM 1000 mg Capsules contain patented OptiMSM methylsulfonylmethane, a non-toxic form of sulfur that is tested in oue own state-of-the-art laboratory for purity and potency. MSM helps support healthy joint cartilage and connective tissue. Available in easy-to-swallow vegetable capsuls for maximum assimilation and absorption. Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, and soybeans. Also free of corn, yeast, gluten, barley, rice, sodium and sugar.