Synergistic Glucosamine MSM Formula with OptiMSM contains pure, sodium-free, potassium-stabilized glucosamine sulfate, as confirmed by HPLC analysis. Glucosamine Sulfate helps support joint health and flexbility. Glucosamine sulfate is the final product of shells derived from ocean-grown shellfish, processed to remove all residues of protein and impurities. Synergistic Glucosamine/MSM Formula also features OptiMSM methylsulfonylmethane, MSM, distilled to be 99,9% pure. MSM is a naturally occurring nutrient that provides sulfur, used by the body to maintain connective tissues. It is recommended to take 3 capsules twice daily with food, or as recommended by a nutritionally-informed physician. Contains shellfish (crab and shrimp shells). Consult your physician before using any health supplement if pregnant, nursing, have a medical condition, taking warfarin or medications for diabetes or glaucoma. Not for use by individuals under the age of 18 years. Keep out of reach of children. Store in a cool dry place.