What are the side effects of curcumin and turmeric?
Turmeric/curcumin supplements are generally safe, but gastrointestinal side effects may occur with higher doses and they can cause problems for people with gallbladder disease, kidney stones, or those taking blood-thinning, blood-sugar-lowering, or immunosuppressant medications. Curcumin may also inhibit iron absorption. Be aware that black pepper extract (piperine) often added to curcumin to increase bioavailability also interacts with a number of medications. For more details about dose, side effects, and drug interactions, see the Concerns and Cautions section of Curcumin and Turmeric Supplements Review (The Review includes our tests and comparisonsas well as Top Picks among curcumin and turmeric products).