Science-Based Nutrition With OptiMSM & BioCell Collagen Dietary Supplement Non-GMO Gluten Free Soy Free Helps Support Healthy Joints, Connective Tissue, Hair, Skin and Nails Doctor's Best Glucosamine Chondroitin MSM + Hyaluronic Acid provides four important nutrients which help maintain healthy joints and connective tissues: glucosamine, chondroitin, Methylsulfonylmethane (MSM, from OptiMSM), and Hyaluronic Acid (BioCell Collagen). Glucosamine sulfate helps promote joint lubrication for better joint movement and flexibility. Cartilage, composed of proteoglycans, is mainly located on bones and near joints and consists primarily of collagen protein with side chains called chondroitin sulfate. MSM supplies bioavailable sulfur needed for joint health. BioCell Collagen is a proven dietary ingredient that contains a patented composition of naturally occurring hydrolyzed collagen type II, chondroitin sulfate, and hyaluronic acid in a highly absorbable matrix. Helps support strong, healthy and flexible joints. Helps support the body's connective tissue. Helps support healthy hair, skin and nails.