Glucosamine 1500 Plus Chondroitin is an advance one-a-day formulation that combines high potent Glucosamine with natural Chondroitin for best results. With vitamin D3 for best calcium absorption, it may help reduce joint inflammation and swelling and increase joint mobility associated with arthritis. It may also relieve arthritic pain temporarily and assist in the management of osteoarthritis. It also helps maintain healthy, mobile, and strong joint cartilages. Derived from seafood.