In India and other parts of Asia, turmeric is used to treat many health conditions. It is believed to have anti-inflammatory and antioxidant properties.
Curcumin, a substance in turmeric, may help to reduce inflammation. Several studies suggest that it might ease symptoms of osteoarthritis and rheumatoid arthritis, like pain and inflammation. Other compounds in turmeric might also be medicinal.
In lab tests, curcumin seems to block the growth of certain kinds of tumors. One study showed that turmeric extract containing curcumin could -- in some cases -- stabilize colorectal cancer that wasn't helped by other treatments. But more research is needed.