Long used as an anti-inflammatory, in both traditional Ayurvedic and Chinese medicines, the food seasoning turmeric (curcumin) has received 21st century scientific validation as a treatment for arthritis, that joint disorder involving chronic inflammation.
A review of 8 randomized clinical trials of turmeric and curcumin-enriched extracts, published in the Journal of Medicinal Food, found clear evidence supporting the ability of turmeric extracts (at 1000 mg a day of dosage) to relieve the symptoms of arthritis.
At least five bioactive components of the turmeric plant were isolated and identified as creating a anti-inflammatory synergy.
Most of the studies done on the benefits of turmeric used test subjects suffering from degenerative knee osteoarthritis and theumatoid arthritis, with mild to moderate severity.
Because curcumin taken from turmeric is a primary spice in the cuisines of India, Pakistan and Bangladesh, epidemeiological studies remain to be done in those countries, assessing the prevalence of arthritic conditions in those countries, based on measuring the amounts of this spice which are normally consumed. Until those results are in, we don't have a good way of knowing how much of this spice needs to be consumed daily to have beneficial effects, unless one takes the 1000 mg. supplements.
"Efficacy of Turmeric Extracts and Curcumin for Alleviating the Symptoms of Joint Arthritis: A Systematic Review and Meta-Analysis of Randomized Clinical Trials." Daily JW. Et al. Journal of Medicinal Food. 2016, August.