2-Amino-2-Deoxy-Glucose, 2-Amino-2-Deoxy-Beta-D-Glucopyranose, 2-Amino-2-Deoxy-D-Glucose Sulfate, 3-Amino-6-(Hydroxymethyl)Oxane-2,4,5-Triol Sulfate, Amino Monosaccharide, Chitosamine, Chlorure de Potassium-Sulfate de Glucosamine, D-Glucosamine, D-Glucosamine Sulfate, D-Glucosamine Sulphate, G6S, Glucosamine, Glucosamine Potassium Sulfate, Glucosamine Sulfate 2KCl, Glucosamine Sulfate-Potassium Chloride, Glucosamine Sulphate, Glucosamine Sulphate KCl, Glucosamine-6-Phosphate, GS, Mono-Sulfated Saccharide, Poly-(1->3)-N-Acetyl-2-Amino-2-Deoxy-3-O-Beta-D-Glucopyranurosyl-4-(or 6-) Sul, Saccharide Mono-Sulfaté, Saccharide Sulfaté, Sulfate de Glucosamine, Sulfate de Glucosamine 2KCl, SG, Sulfated Monosaccharide, Sulfated Saccharide, Sulfato de Glucosamina.
Overview InformationGlucosamine sulfate is a naturally occurring chemical found in the human body. It is in the fluid around joints. Glucosamine also exists in other places in nature. For example, glucosamine sulfate used in dietary supplements is often obtained from the shells of shellfish. Glucosamine sulfate used in dietary supplements does not always come from natural sources. It can also be made in a laboratory.
There are different forms of glucosamine including glucosamine sulfate, glucosamine hydrochloride, and N-acetyl glucosamine. These different chemicals have some similarities, but they may not have the same effects when taken as a dietary supplement. Most of the scientific research on glucosamine has involved glucosamine sulfate. See separate listings for glucosamine hydrochloride or N-acetyl glucosamine.
Dietary supplements that contain glucosamine often contain additional ingredients. These additional ingredients are frequently chondroitin sulfate, methylsulfonylmethane (MSM), or shark cartilage. Some people think these combinations work better than taking just glucosamine sulfate alone. So far, researchers have found no proof that combining the additional ingredients with glucosamine adds any benefit.
Some glucosamine sulfate products are not labeled accurately. In some cases, the amount of glucosamine actually in the product has varied from none to over 100% of the amount stated on the product's label. Some products have contained glucosamine hydrochloride when glucosamine sulfate was listed on the label.
Glucosamine sulfate is most commonly used for osteoarthritis. It is also used for many other conditions, but there is no good scientific evidence to support these uses.
How does it work?Glucosamine sulfate is a chemical found in the human body. It is used by the body to produce a variety of other chemicals that are involved in building tendons, ligaments, cartilage, and the thick fluid that surrounds joints.
Joints are cushioned by the fluid and cartilage that surround them. In some people with osteoarthritis, the cartilage breaks down and becomes thin. This results in more joint friction, pain, and stiffness. Researchers think that taking glucosamine supplements may either increase the cartilage and fluid surrounding joints or help prevent breakdown of these substances, or maybe both.
Some researchers think the "sulfate" part of glucosamine sulfate is also important. Sulfate is needed by the body to produce cartilage. This is one reason why researchers believe that glucosamine sulfate might work better than other forms of glucosamine such as glucosamine hydrochloride or N-acetyl glucosamine. These other forms do not contain sulfate.
Uses & Effectiveness
Likely Effective for
- Osteoarthritis. Most research shows that taking glucosamine sulfate can provide some pain relief for people with osteoarthritis, especially those with osteoarthritis of the knees. For some people, glucosamine sulfate might work as well as over-the-counter and prescription pain medications such as acetaminophen or ibuprofen; however, pain medications work quickly while glucosamine sulfate can take 4-8 weeks before it provides pain relief. Also, people who take glucosamine sulfate often still need to take pain medications for pain flare-ups.
In addition to relieving pain, glucosamine sulfate might also slow the breakdown of joints and prevent the condition from getting worse if it is taken for several years. Some research shows that people who take glucosamine sulfate might be less likely to need total knee replacement surgery.
There are several kinds of glucosamine products. The most research showing benefit is for products that contain glucosamine sulfate. Products that contain glucosamine hydrochloride do not seem to work as well. Many products contain both glucosamine with chondroitin, but there is no evidence that these products work any better than glucosamine sulfate by itself.
Glucosamine sulfate does not seem to prevent people from getting osteoarthritis.
Insufficient Evidence for
- Joint pain caused by drugs called aromatase inhibitors (aromatase inhibitor-induced arthralgias). Early research suggests that taking a combination of glucosamine sulfate and chondroitin sulfate in two or three divided doses daily for 24 weeks reduces pain in women taking drugs that lower estrogen levels for early stage breast cancer.
- Heart disease. People who take glucosamine might have a lower risk of developing heart disease. But it's unclear what dose or form of glucosamine might work best. Other forms of glucosamine include glucosamine hydrochloride and N-acetyl glucosamine. It's also unclear if this lower risk is from glucosamine or from following healthier lifestyle habits.
- Knee pain. Some research shows that taking a specific product containing glucosamine sulfate, methylsufonlylmethane, white willow bark extract, ginger root concentrate, Indian frankincense extract, turmeric root extract, cayenne, and hyaluronic acid (Instaflex Joint Support, Direct Digital, Charlotte, NC) in three divided doses daily for 8 weeks reduces joint pain in people with knee pain. But this product doesn't seem to help joint stiffness or function. Other early research shows that taking 1500 mg of glucosamine sulfate daily for 28 days does not reduce knee pain in athletes following a knee injury. However, it does seem to improve knee movement.
- Multiple sclerosis (MS). Early research shows that taking 1000 mg of glucosamine sulfate by mouth daily for 6 months might reduce the relapse of multiple sclerosis.
- Recovery after surgery. Early research shows that taking glucosamine sulfate does not improve function, pain, and performance in male athletes who had surgery to fix a torn ACL. The ACL is a ligament that holds the knee in place during movement.
- Stroke. People who take glucosamine might have a slightly lower risk of having a stroke. But it's unclear what dose or form of glucosamine might work best. Other forms of glucosamine include glucosamine hydrochloride and N-acetyl glucosamine. It's also unclear if this lower risk is from glucosamine or from following healthier lifestyle habits.
- Jaw pain (Temporomandibular disorder). Some research shows that taking glucosamine sulfate works about as well as the nonsteroidal anti-inflammatory drug (NSAID) ibuprofen (Motrin, Advil, etc.) for relieving jaw pain. In some people, pain relief appears to continue for up to 90 days after glucosamine sulfate is discontinued. But research suggests that when 1200 mg of glucosamine sulfate is taken by mouth daily for 6 months, jaw pain and the ability to open the jaw are not improved.
- A group of eye disorders that can lead to vision loss (glaucoma).
- Joint pain.
- Painful bladder syndrome (Interstitial cystitis).
- Weight loss.
- Other conditions.
Side Effects & SafetyWhen taken by mouth: Glucosamine sulfate is LIKELY SAFE in most adults. Glucosamine sulfate can cause some mild side effects including nausea, heartburn, diarrhea, and constipation. Uncommon side effects are drowsiness, skin reactions, and headache.
When given as a shot: Glucosamine sulfate is POSSIBLY SAFE when injected into the muscle as a shot twice weekly for up to 6 weeks.
Special Precautions & Warnings:Pregnancy or breast-feeding: There isn't enough reliable information to know if glucosamine sulfate is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.
Asthma: There is one report linking an asthma attack with taking glucosamine. It is not known for sure if glucosamine was the cause of the asthma attack. Until more is known, people with asthma should be cautious about taking products that contain glucosamine.
Diabetes: Some early research suggested that glucosamine sulfate might raise blood sugar in people with diabetes. However, more recent and more reliable research now shows that glucosamine sulfate does not seem to affect blood sugar control in people with type 2 diabetes. Glucosamine appears to be safe for most people with diabetes, but blood sugar should be monitored closely.
Glaucoma: Glucosamine sulfate might increase the pressure inside the eye and could worsen glaucoma. If you have glaucoma, talk to your healthcare provider before taking glucosamine.
High cholesterol: Animal research suggests that glucosamine may increase cholesterol levels. In contrast, glucosamine does not seem to increase cholesterol levels in humans. However, some early research suggests that glucosamine might increase insulin levels. This might cause cholesterol levels to increase. To be on the safe side, monitor your cholesterol levels closely if you take glucosamine sulfate and have high cholesterol.
High blood pressure: Early research suggests that glucosamine sulfate can increase insulin levels. This might cause blood pressure to increase. However, more reliable research suggests that glucosamine sulfate does not increase blood pressure. To be on the safe side, monitor your blood pressure closely if you take glucosamine sulfate and have high blood pressure.
Shellfish allergy: There is some concern that glucosamine products might cause allergic reactions in people who are sensitive to shellfish. Glucosamine is produced from the shells of shrimp, lobster, and crabs. Allergic reactions in people with shellfish allergy are caused by the meat of shellfish, not the shell. But some people have developed an allergic reaction after using glucosamine supplements. It is possible that some glucosamine products might be contaminated with the part of the shellfish meat that can cause an allergic reaction. If you have a shellfish allergy, talk to your provider before using glucosamine.
Surgery: Glucosamine sulfate might affect blood sugar levels and might interfere with blood sugar control during and after surgery. Stop taking glucosamine sulfate at least 2 weeks before a scheduled surgery.
Do not take this combination
Warfarin (Coumadin) interacts with GLUCOSAMINE SULFATE
Warfarin (Coumadin) is used to slow blood clotting. There are several reports showing that taking glucosamine with or without chondroitin increase the effect of warfarin (Coumadin) on blood clotting. This can cause bruising and bleeding that can be serious. Don't take glucosamine if you are taking warfarin (Coumadin).
Be cautious with this combination
Medications for cancer (Antimitotic chemotherapy) interacts with GLUCOSAMINE SULFATE
Some medications for cancer work by decreasing how fast cancer cells can copy themselves. Some scientists think that glucosamine might increase how fast tumor cells can copy themselves. Taking glucosamine along with some medications for cancer might decrease the effectiveness of these medications for cancer.
Some of these medications are etoposide (VP16, VePesid), teniposide (VM26), and doxorubicin (Adriamycin).
Be watchful with this combination
Acetaminophen (Tylenol, others) interacts with GLUCOSAMINE SULFATE
There is some concern that taking glucosamine sulfate and acetaminophen (Tylenol, others) together might affect how well each works. But more information is needed to know if this interaction is a big concern.
Medications for diabetes (Antidiabetes drugs) interacts with GLUCOSAMINE SULFATE
There has been concern that glucosamine sulfate might increase blood sugar in people with diabetes. There was also the concern that glucosamine sulfate might decrease how well medications used for diabetes work. However, research now indicates that glucosamine sulfate probably does not increase blood sugar in people with diabetes. Therefore, glucosamine sulfate probably does not interfere with diabetes medications. To be cautious, if you take glucosamine sulfate and have diabetes, monitor your blood sugar closely.
Some medications used for diabetes include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTab, Micronase), insulin, pioglitazone (Actos), rosiglitazone (Avandia), chlorpropamide (Diabinese), glipizide (Glucotrol), tolbutamide (Orinase), and others.
The following doses have been studied in scientific research:
- For osteoarthritis: 1500 mg once daily or 500 mg three times daily, either alone or together with 400 mg of chondroitin sulfate two or three times daily, has been used for up to 3 years. Also glucosamine sulfate 750 mg twice daily in combination with turmeric root extract 500 mg twice daily has been used for 6 weeks.
- For osteoarthritis: A cream containing 30 mg/gram of glucosamine sulfate, 50 mg/gram of chondroitin sulfate, 140 mg/gram of shark cartilage, 32 mg/gram of camphor, and 9 mg/gram of peppermint oil has been applied to the skin as needed for 8 weeks.
- For osteoarthritis: 400 mg of glucosamine sulfate has been injected twice weekly for 6 weeks.
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