Nutrition Month

Saturday, February 26, 2011

Glucosamine fortified products for your joint health

Glucosamine is a compound found naturally in the body, made from glucose and the amino acid glutamine. Glucosamine is needed to produce glycosaminoglycan, a molecule used in the formation and repair of cartilage and other body tissues. Production of glucosamine slows with age.

Since glucosamine can be made from the shells of shrimp, crab, and other shellfish, people with shellfish allergy or iodine hypersensitivity may have an allergic reaction to glucosamine products. However, some research suggests that there is not enough shrimp allergen in glucosamine supplements to trigger reactions in patients who are allergic to shrimp. Nevertheless, caution is warranted. A serious hypersensitivity reaction including throat swelling has been reported with glucosamine sulfate. There are reported cases suggesting a link between glucosamine/chondroitin products and asthma exacerbations.


Glucosamine supplements are widely used for osteoarthritis, particularly knee osteoarthritis. In osteoarthritis, cartilage -- the rubbery material that cushions joints -- becomes stiff and loses its elasticity. This makes the joint prone to damage and may lead to pain, swelling, loss of movement, and further deterioration.

Since the body's natural glucosamine is used to make and repair joint cartilage, taking glucosamine as a nutritional supplement is thought to help repair damaged cartilage by augmenting the body's supply of glucosamine.

There is promising evidence that glucosamine may reduce pain symptoms of knee osteoarthritis and possibly slow the progression of osteoarthritis. For example, a study published in the journal Archives of Internal Medicine examined people with osteoarthritis over three years. Researchers assessed pain and structural improvements seen on x-ray. They gave 202 people with mild to moderate osteoarthritis 1,500 mg of glucosamine sulfate a day or a placebo.

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