NOW® Liquid Glucosamine & Chondroitin with MSM combines three of the best known nutrients available for the support of healthy joints in a convenient liquid form.* Scientific studies have demonstrated that glucosamine and chondroitin can promote normal joint mobility and comfort.* MSM is present as a naturally occurring sulfur compound and manganese and vitamin C have been included as complementary ingredients to provide optimal nutritional support for the production of healthy joint structures.* NOW Foods developed the glucosamine test method chosen as the official AOACI industry standard method. Natural color variation may occur in this product.