Glucosamine is a natural substance in the cells of cartilage between joints. Your body produces the glucosamine it needs to protect your bones, but production decreases with age. Injuries to joints may damage cartilage and connective tissues, which increases your need for glucosamine. Glucosamine sulfate is commonly used for arthritis.

Nutritional supplement products are not intended to diagnose, treat, cure or prevent any disease. Dietary supplements supplement your diet, they do not replace it. You should consult your physician before taking vitamins, minerals, health nutritional supplements or herbal products.