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Curcumin (turmeric extract)

Also known as: Turmeric, Curcuma longa

The main active compound in turmeric. Standard turmeric is poorly absorbed, so studied products are usually enhanced extracts.

Common forms: Enhanced-absorption extracts (e.g. with piperine or phospholipids) · Turmeric powder

Draft summary, not yet reviewed by a qualified health professional · Last updated 2026-11-03

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This information is for education only and is not medical advice, diagnosis, or treatment. Supplements can interact with medications and health conditions. Check with your doctor or pharmacist before starting anything, especially if you take medication, are pregnant or breastfeeding, or have a health condition. These statements have not been evaluated by the FDA; supplements are not intended to diagnose, treat, cure, or prevent any disease.

What the evidence says

Joint comfort

BModerate evidence

Meta-analyses of randomized trials found turmeric/curcumin extracts reduced knee osteoarthritis pain versus placebo, with effects in some trials comparable to NSAIDs. Trials are small and short.

Dose used in studies
500–1,000 mg/day curcuminoids
Time to effect
4–12 weeks
Studies (2)

Safety

Common side effects

  • Stomach upset
  • Nausea
  • Diarrhea

Avoid or ask your doctor first if

  • You have gallstones or liver disease (rare liver injury reported with concentrated products)
  • You have surgery scheduled within 2 weeks

Pregnancy & breastfeeding

Use only with guidance from your prenatal care provider.

Medication interactions

  • moderateBlood thinners: May increase bleeding risk.
  • moderateAntiplatelets: May increase bleeding risk.
  • minorDiabetes medications: May lower blood sugar.

This list covers common medication classes only and is not exhaustive.

Buying tips

Look for third-party testing seals (USP Verified, NSF Certified, or Informed Choice) and match the form and dose used in studies.

Where to buy (affiliate)

Further reading