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Chondroitin

Chondroitin sulfate

Supplements. Modern nutrition.

Also called Chondroitin sulfate, Cartilage extract

Pinyin: liú suān ruǎn gǔ sù

Spanish: Condroitina (sulfato de condroitina)

May add to warfarin's effect

A long sugar chain found in cartilage that helps it hold water and cushion joints, sold mainly for osteoarthritis pain.

Did you know? In many countries outside the US, certain chondroitin sulfate products are sold as prescription drugs.

What it may help, and how strong the proof is

Joint pain & arthritis. For hand osteoarthritis, one trial found some pain relief. One trial is too little to confirm benefit.See the research: 201 studies in people
Promising proof
Inflammation. Lab studies suggest chondroitin can calm some inflammation signals. Human proof for this is weak.See the research: 108 studies in people
Traditional proof
Joint pain & arthritis. For knee osteoarthritis, the large US GAIT trial did not show a clear pain benefit overall. The American College of Rheumatology (ACR) guidelines of 2019 and 2026 strongly advise against it for knee and hip osteoarthritis.See the research: 201 studies in people
Unproven

Parts of the body

Joints, Immune system

Traditional use

Not an old herbal remedy. It became popular as a joint supplement in the 1990s, usually paired with glucosamine.

How it is classified

Herbal actions: Anti-inflammatory, Analgesic. Energy: neutral.

How people take it

Trials often used about 800 to 1,200 milligrams a day for several months. Pain relief, when it happens, usually takes weeks to show.

Capsule, tablet and powder.

Where to get it

Chondroitin is usually made from animal cartilage, often from cattle, pigs or sharks. Shark-cartilage versions have no good trial proof and raise conservation concerns. It is sold as capsules, tablets and powders, often in joint blends with glucosamine.

Be careful

Side effects are usually mild, such as stomach upset. Chondroitin may raise bleeding risk, especially with warfarin, based on case reports. Choose brands with third-party testing, since supplement quality varies. Pregnancy and breastfeeding are not well studied, so avoid it unless a clinician approves.

Avoid if: pregnancy; breastfeeding; bleeding disorders.

Mixing with other things

Works well together
Usually sold together in joint formulas. Evidence for the combination is limited.
Use caution
Blood thinners (warfarin, Eliquis, Xarelto, Plavix, daily aspirin)
May raise bleeding risk and the INR (a blood test that tracks warfarin), based on case reports. Your clinician may want to check blood tests if you start or stop it.

Adds up with others that may slow blood clotting: , , , , , , , , , , , , , and 47 more.

The honest take

Chondroitin has been studied for years with mixed results. Some smaller analyses show modest pain relief, but large trials and the ACR guidelines (2019 and 2026) do not support it for knee or hip osteoarthritis. One trial found some relief in the hand, and it has not been proven to rebuild cartilage.

Sources

Each “See the research” link opens PubMed, the U.S. National Library of Medicine's index of medical studies, showing only trials and reviews done in people. The number tells you how much a use has been tested, not whether it worked. The proof rating tells you that.

Study counts checked October 2026.