Science-Based Nutrition Dietary Supplement OptiMSM Maintains Healthy Joints & Connective Tissue Not Suitable for VegetariansGlucosamine Chondroitin MSM contains sodium-free potassium stabilized glucosamine sulfate, bovine chondroitin sulfate plus pure MSM (OptiMSM). Helps maintain strong, healthy and flexible joints. Supports the body"s connective tissue. Benefits hair, skin and nails.