Glucosamine is a compound that is naturally made in humans. It is involved in the creation of molecules that form cartilage.
Evidence supports the use of glucosamine sulfate in the treatment of knee osteoarthritis. It is believed that the sulfate portion may help strengthen cartilage. If this is confirmed, it would mean that the glucosamine sulfate form is more effective than glucosamine without sulfate.
Glucosamine is often taken together with chondroitin, which comes from cartilage. The use of integrative therapies like glucosamine is often seen in people with osteoarthritis. These treatments may help reduce doses of drugs such as nonsteroidal anti-inflammatory agents (NSAIDs).
Glucosamine has also been studied for possible benefits on wound healing, skin conditions such as psoriasis, and the prevention of migraine. More research is needed in these areas.
Research shows that glucosamine is well tolerated for up to three years. However, people who are allergic to shellfish should avoid using it.
There have been concerns about the effects of glucosamine on insulin and blood sugar. However, some recent studies suggest that glucosamine may not affect these measures. This remains an area of controversy.
2-Acetamido-2-deoxyglucose, acetylglucosamine, aminoglycoside, Arth-X Plus®, Artrox®, chitosamine, chitosan, D-glucosamine, D-glucosaminic acid, enhanced glucosamine sulfate, Flexi-Factors®, GlcN, GlcN-HCl, GlcN-S, glucosamine chlorohydrate, Glucosamine Complex®, glucosamine hydrochloride, glucosamine hydroiodide, Glucosamine Mega®, glucosamine N-acetyl, glucosamine sulfate, glucosamine sulphate, glucosamine-hydrochloride, glutamate, glutathione, Joint Factors®, N-acetylated low-molecular-weight chitosan, N-acetyl-D-glucosamine (NAG, N-A-G), N-acetylglucosamine, Nutri-Joint®, poly-N-acetyl glucosamine, poly-NAG, Teoremac®, Ultra Maximum Strength Glucosamine Sulfate®.
Note: Move Free® Advanced (glucosamine, chondroitin, hyaluronic acid, Uniflex proprietary extract), Tradamixina (Alga Ecklonia Bicyclis, Tribulus Terrestris, D-Glucosamine, and N-Acetyl-D-Glucosamine).
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider.
Evidence supports the use of glucosamine sulfate taken by mouth to treat knee osteoarthritis. Nearly all studies have used glucosamine sulfate supplied by Rotta Research Laboratorium, a manufacturer in Europe. It is unclear if glucosamine sold by other manufacturers are equally effective. Studies demonstrating a lack of efficacy have included people with severe osteoarthritis or used formulas other than glucosamine sulfate.
Several studies have found that glucosamine may benefit osteoarthritis in other body parts, aside from the knee. However, there is less evidence to support this compared to knee osteoarthritis. Knee osteoarthritis appears to respond better than other joints to any treatment. Overall, high-quality studies are lacking. More research is needed in this area.
Bone diseases (Kashin-Beck disease)
Preliminary evidence suggests that glucosamine with and without chondroitin sulfate may preserve articular cartilage, decrease pain, increase physical function, and enhance self-care activities in people with Kashin-Beck disease (KBD). Further research is needed.
Glucosamine has been studied for chronic venous insufficiency, a disease in which there are problems sending blood back to the heart from the legs. Currently, there is a lack of evidence supporting the use of glucosamine for this disorder. More research is needed in this area.
There is controversy regarding the effects of glucosamine on insulin and blood sugar. Despite concerns about the use of glucosamine in people with diabetes, some studies suggest that it may lack significant effects on insulin or blood sugar. Further research is needed in this area.
Inflammatory bowel disease (Crohn's disease, ulcerative colitis)
Early research suggests a lack of evidence to support the use of glucosamine in the treatment of inflammatory bowel disease. More research is needed in this area.
Interstitial cystitis (bladder wall inflammation)
Early study suggests that a product containing both glucosamine sulfate and chondroitin sulfate may benefit interstitial cystitis symptoms. More research is needed in this area.
A few studies have found improvement in knee pain with the use of glucosamine. Although promising, further research is needed before conclusions may be made.
Lumbar pain (lower back pain)
Glucosamine sulfate has been studied in the treatment of lumbar pain (pain near the lower spine). Treatment with glucosamine sulfate alone or in combination with potassium may help reduce pain. Another study reported a lack of effect on low back pain. Additional studies are needed in this area.
Early evidence suggests that the use of glucosamine may lack an effect in people who have multiple sclerosis. More research is needed in this area.
Early evidence suggests that there is a lack of evidence to support glucosamine use for rheumatoid arthritis. More research is needed in this area.
A glucosamine combination product has been shown to improve sexual dysfunction in men. Further studies are required before firm conclusions can be made.
Temporomandibular joint (TMJ) disorders
Early evidence suggests a lack of evidence to support glucosamine alone or in combination with chondroitin for TMJ disorders (jaw and face pain). More research is needed in this area.
Glucosamine has been studied for its possible benefits in lowering low-density lipoprotein (LDL or "bad") cholesterol. It has also been studied for increasing high-density lipoprotein (HDL or "good") cholesterol. Results from these studies show that glucosamine lacked significant benefits. Additional study is needed in this area.