Turmeric is the spice that gives curry its yellow color. It has been used in India for thousands of years as a spice and medicinal herb. Recently, many studies backed up what the Indians have known for a long time ago. Turmeric contains compounds with medicinal properties. The compounds are called curcuminoids, the most important of which is curcumin.
Curcumin is the main active ingredient in turmeric. It has powerful anti-inflammatory effects and is a very strong antioxidant. Most studies used turmeric extracts that are standardized to include large amounts of curcumin.