Glucosamine is sugar protein naturally found in joint cartilage, bone marrow, shellfish and fungus.
Although the body can make its own glucosamine, supplements are sometimes used by people looking to relieve pain and symptoms of osteoarthritis and other joint disorders.
The active ingredient can be made synthetically or derived from the shells of shellfish.
A recent study by the British Medical Journal has suggested Glucosamine may lower the risk of cardiovascular disease, however more research is needed.
Note: People with an allergy to shellfish should not take it, nor should women who are pregnant or breastfeeding. Glucosamine should be avoided by people taking warfarin, as it may affect blood clotting. It may also decrease the effectiveness of some anti-cancer drugs, say experts.
Like any supplement or medication, it may cause side-effects in some individuals and we recommend you seek advice from your qualified healthcare professional before taking.