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 comparisons
as well as Top Picks
among curcumin and turmeric products).
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I read that turmeric may be a GI irritant. I have GI problems and wonder if I should avoid turmeric and curcumin? >>
After taking a curcumin supplement, I started getting chronic diarrhea which went away when I stopped taking it. Can curcumin supplements cause diarrhea? >>
Can turmeric or curcumin with black pepper extract cause constipation? I had this problem when taking a curcumin formula with piperine, but it resolved when I switched to a curcumin supplement without this added ingredient. >>
Is it safe to take curcumin or turmeric supplements for a long period of time? >>
I use a brand of curcumin and the most recent bottle contained capsules a few shades lighter than what I am accustomed to taking. Is this color change an issue to be concerned about? >>
There are many reports of lead contamination in turmeric spice. How can I make sure I'm not getting lead in my turmeric supplement or spice? >>
Are there drug interactions with curcumin or turmeric? >>
Is it true that taking turmeric/curcumin with food can reduce iron absorption from food? >>
What are the effects of curcumin on the liver? >>