Chondroitin sulfate
Chondroitin sulfate

Background

Chondroitin sulfate is a chemical found in human and animal cartilage. It is commonly used by mouth with glucosamine or other ingredients for osteoarthritis.

Chondroitin sulfate is one of the building blocks of cartilage. In osteoarthritis, the cartilage in the joints breaks down. Taking chondroitin sulfate might slow this breakdown. It is usually manufactured from animal sources, such as shark and cow cartilage. It can also be made in a lab.

Chondroitin sulfate is used for osteoarthritis and cataracts. It is often used together with other ingredients, including manganese ascorbate, hyaluronic acid, collagen peptides, or glucosamine. Chondroitin sulfate is also used for many other conditions, but there is no good scientific evidence to support these uses.
When taken by mouth: Chondroitin sulfate is likely safe when used for up to 6 years. It can cause some mild stomach pain and nausea. Other possible side effects include bloating, diarrhea, and constipation.

When placed into the eye: Chondroitin sulfate is possibly safe when used together with other ingredients in an eye drop.

Special Precautions & Warnings:

Pregnancy and breast-feeding: There isn't enough reliable information to know if chondroitin sulfate is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.

Asthma: There is some concern that chondroitin sulfate might make asthma worse. If you have asthma, use chondroitin sulfate cautiously.

Prostate cancer: Early research suggests that chondroitin might cause the spread or recurrence of prostate cancer. This effect has not been shown with chondroitin sulfate supplements. However, until more is known, do not take chondroitin sulfate if you have prostate cancer or are at high risk for developing it (you have a brother or father with prostate cancer).

Effectiveness

NatMed Pro rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, Ineffective, and Insufficient Evidence to Rate.
Likely effective Effectiveness definitions
Possibly effective Effectiveness definitions
  • Cataracts. An injectable solution containing chondroitin sulfate and sodium hyaluronate is approved by the FDA to protect the eye during cataract surgery. It is not clear if using it in a different form will help.
  • Osteoarthritis. Taking chondroitin sulfate by mouth seems to provide some relief from osteoarthritis pain and improve function. High quality, pharmaceutical-grade products have shown the most benefit. Chondrosulf (IBSA Institut Biochimique SA), Chondrosan (Bioiberica, S.A.) and Structum (Laboratoires Pierre Fabre) are examples of these products.
There is interest in using chondroitin sulfate for a number of other purposes, but there isn't enough reliable information to say whether it might be helpful.
Likely ineffective Effectiveness definitions
Possibly ineffective Effectiveness definitions
Insufficient evidence Effectiveness definitions

Dosing & administration

Chondroitin sulfate is most commonly used by adults in doses of 800-1200 mg per day, for up to 2 years.

There is concern that some chondroitin sulfate products are not labeled accurately. Some products might contain no chondroitin, while other products might contain more than the amount stated on the product's label. Because of these issues, the effects of different chondroitin products may vary. Speak with a healthcare provider to find out what dose or product might be best.

Interactions with pharmaceuticals

Warfarin (Coumadin)

Interaction Rating=Moderate Be cautious with this combination.

Warfarin is used to slow blood clotting. There are several reports showing that taking chondroitin with glucosamine increases the effects of warfarin. This can cause bruising and bleeding that can be serious. Don't take chondroitin if you are taking warfarin.

Interactions with herbs & supplements

Glucosamine: Taking chondroitin sulfate together with glucosamine hydrochloride might reduce blood levels of glucosamine. But it's not clear if this will change the effects of glucosamine hydrochloride. It's also not clear if this interaction occurs with other forms of glucosamine, such as glucosamine sulfate.

Interactions with foods

There are no known interactions with foods.
ChondroPlex
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This monograph was last reviewed on 07/12/2023 11:00:00 and last updated on 08/02/2023 07:17:40. Monographs are reviewed and/or updated multiple times per month and at least once per year.
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