What the NIH says about the evidence
- NCCIH says we do not know enough to conclude that turmeric or curcumin is beneficial for any health purpose.
- Early results for knee pain and stiffness from osteoarthritis are positive, but NCCIH says higher-quality studies are needed.
- Products differ in how much curcumin they contain, which makes studies hard to compare.
Safety
- Ordinary turmeric or curcumin by mouth is likely safe in recommended amounts for up to two or three months. It can cause nausea, reflux, stomach upset, diarrhea or constipation.
- Liver damage has been reported in some people who used curcumin products made to be absorbed more easily.
- Stop taking it and see your doctor if you notice tiredness, nausea, poor appetite, dark urine or yellowing of the skin or eyes.
- Turmeric supplements may be unsafe during pregnancy.
Please note: this page is general information, not medical advice. Ask your doctor what is right for you, especially if you have a health condition or take medicine.
