Turmeric and arthritis pain (osteoarthritis and rheumatoid arthritis): what the evidence says

We read 27 of the 45 systematic reviews and meta-analyses PubMed lists for turmeric and arthritis, then the 21 largest randomized and clinical trials and 2 case reports: 50 of the 155 human-study records PubMed returned.

For knee osteoarthritis, nearly every pooled analysis finds less pain than with a placebo. A 2022 analysis of 15 trials (1,670 patients) found pain 1.77 points lower on a 10-point scale, and the largest single trial (367 patients in Thailand) found a turmeric extract no worse than ibuprofen over 4 weeks, with less stomach pain.

Quality is the weak point. A 2025 appraisal rated 37 of 48 pooled results as extremely low quality, the trials mostly last 4 to 16 weeks, results vary widely between them, pain relief was smaller in heavier patients, and many trials test one company's branded extract. Five company-run joint trials with 1,068 people were never published (see Beyond Google).

The most carefully run Western trial (70 patients in Tasmania, 12 weeks) found 9 mm less pain on a 100 mm scale than placebo, but no change in joint swelling on MRI or in cartilage.

Rheumatoid arthritis is weaker. Small pooled trials show lower disease activity, but the largest and longest trial, 200 patients in remission followed for a year, found curcumin with piperine did not prevent flares (60% vs 64% flare-free).