Science-Based Nutritionâ„¢ Supports Joint & Skin Health Dietary Supplement Non-GMO Gluten Free Soy Free At Doctor's Best, we cherish beauty and flexibility. Our expertly crafted formula contains a patented composition of collagen, chondroitin sulfate, and hyaluronic acid, which work synergistically to support both joint function and skin health, nurturing beauty from the inside out. Supports joint health Supports skin health. Non-GMO, Gluten Free, Soy Free.