Glucosamine is an amino sugar, meaning it is made from a protein molecule mixed with a sugar molecule. It occurs naturally in the body, although production may decrease with age. Glucosamine is not easily obtained from food sources, so supplements provide a safe and easy way to top up. Chondroitin Sulphate is a sulphated glycosaminoglycan, composed of a chain of alternating sugars. It is usually attached to proteins as part of a proteoglycan. Chondroitin sulphates are a structural component of cartilage. MSM is a rich naturally occurring source of sulphur which is required for the structure and function of 150 compounds within the body, including tissues, enzymes, hormones, antibodies and antioxidants. Natures Aid Glucosamine, Chondroitin & MSM liquid provides an alternative to tablets and provides Glucosamine 1500mg, MSM 500mg & Chondroitin 400mg Liquid with Vitamin C. Vitamin C contributes to normal collagen formation and normal function of cartilage.