Help support an active lifestyle with Nature Made TripleFlex Triple Strength(1) with Vitamin D. Nature Made TripleFlex Triple Strength with Vitamin D 50 mcg (2000 IU) is formulated with key nutrients plus Vitamin D3 to help support joint health muscle health and healthy bones. Nature Made TripleFlex Triple Strength is a combination of three ingredients to help support joint health with two caplets daily. Glucosamine is a natural compound that is a building block for cartilage. Cartilage helps maintain the structural integrity you need for healthy joints. Chondroitin helps keep your joints moving smoothly by helping support joint cushioning. MSM is a source of dietary sulfur a trace element used by the body in collagen connective tissue and joint cartilage. Vitamin D helps support healthy bones and muscles. (1)Contains glucosamine hydrochloride (1500 mg) chondroitin sulfate (800 mg) MSM (750 mg) and Vitamin D3 2000IU (50 mcg) per two caplets. Joint Support.