Also known as: Indian saffron, curcumin.

Potential uses: It's thought that turmeric, an antioxidant, can reduce the risk of many cancers as well as infections and inflammation.

Usual dose: Turmeric is a spice used in cooking (in many curries and other Asian/Indian dishes). Some dietary supplements are on the market, but there is no typical dose.

Are there any risks? The amount eaten in foods is well-tolerated by most people. The side effects of large doses may include allergic response and...