Natrol Glucosamine Chondroitin and MSM Description: Clinically Tested Ingredients to Promote Optimal Joint Flexibility, Lubrication, Mobility and Comfort Helps Rebuild Cartilage Tissue Optimize joint health with Glucosamine Chondriotin and MSM. Natrol combines three of the most powerful, clinically tested joint health ingredients to help promote joint flexibility, strength and comfort. Glucosamine helps regenerate and rebuild cartilage tissue. Chondroitin promotes lubricating fluids for your joints. And MSM helps maintain the elasticity of joint tissue. Free Of Yeast, wheat, corn, milk, egg, soy, glutens, artificial colors, flavors, added sugar, starch and preservatives.