Research Summary
Chondroitin Supplement Eased Mild Knee Arthritis Symptoms Over Placebo in a 100-Person Trial
Adults with mild knee arthritis who took a daily chondroitin sulfate supplement for 12 weeks reported less pain and stiffness and walked faster than those who took a placebo. The trial was published in the journal Nutrients.
What was studied
Chondroitin sulfate is a popular supplement for knee osteoarthritis, but past research on whether it actually helps symptoms has been mixed. Researchers at Woosuk University in South Korea set out to test it in people with early, mild disease.
In this 12-week randomized, double-blind, placebo-controlled trial, 100 adults with mild knee osteoarthritis were split evenly: 50 took 1,200 mg of chondroitin sulfate a day and 50 took a placebo. The main outcome was the Korean version of the WOMAC, a standard questionnaire covering knee pain, stiffness and daily function. The team also measured pain on a 100 mm scale, the time to walk 20 meters, hand symptoms, and grip and pinch strength.
Key findings
- WOMAC total scores dropped by about 19 points with chondroitin versus about 2 points with placebo, and pain, stiffness and function scores each improved more with chondroitin.
- Pain on the 100 mm scale fell by about 19 mm with chondroitin versus about 3 mm with placebo.
- The 20-meter walk got about 1.4 seconds faster with chondroitin, while the placebo group did not improve.
- Hand symptoms and grip and pinch strength also improved more with chondroitin.
- The authors reported no clinically meaningful safety concerns.
What it means for people with knee pain
For people with mild knee arthritis, this trial adds some support for trying chondroitin sulfate alongside proven basics like exercise and weight management. Supplements vary in quality and dose, so check with your doctor or pharmacist before starting one, especially if you take other medicines.
Limitations
The study was small, lasted only 12 weeks and was run in one country with people who had mild disease only, so results may not apply to moderate or severe arthritis or to long-term use. The placebo group improved unusually little, and earlier trials of chondroitin have given inconsistent results. Larger, longer independent studies are needed.
Frequently asked questions
- Does chondroitin help knee arthritis pain?
- In this 100-person trial of adults with mild knee osteoarthritis, 1,200 mg a day of chondroitin sulfate reduced pain, stiffness and function scores more than placebo over 12 weeks. Earlier research has been mixed, so it is not a guaranteed fix.
- What dose of chondroitin was used?
- Participants took 1,200 mg of chondroitin sulfate per day for 12 weeks.
- Is chondroitin safe to take?
- The researchers reported no clinically meaningful safety concerns during the 12-week study. Ask your doctor or pharmacist before starting it, especially if you take other medicines.
Sudden severe pain, swelling, or can't bear weight? Seek medical care promptly. In an emergency call 911.