Evidence explainerTurmeric and curcumin

Turmeric and Curcumin Benefits: Modest Signals, Low-Quality Trials

NCCIH says there is not enough evidence to conclude turmeric benefits any health purpose. Pooled trials show modest signals for knee comfort and exercise soreness, and none for overall cognition.

By Kymata Health editorial teamPublished October 9, 2026Last reviewed October 9, 2026

Medical review pending. Written by our editorial team from the studies cited below; a credentialed clinician has not reviewed it yet. Educational only, not medical advice.

Key takeaways

  • NCCIH says there is not enough evidence to conclude that turmeric or curcumin benefits any health purpose [1].
  • In adults with knee osteoarthritis, curcuminoid formulations improved pain and function scores more than placebo, but trial quality was low [2].
  • Across 14 studies (349 people), curcumin lowered muscle soreness and creatine kinase after muscle-damaging exercise, with high heterogeneity [3].
  • Across 10 human studies (531 people), curcumin had no significant effect on global cognition [4].

Safety at a glance

From our Turmeric and curcumin monograph. Published interactions and cautions only, each with its source.

Interactions

  • Prescription medicines. NCCIH advises talking with a health care provider before combining herbal products with any medicine because some herbs and medicines interact in harmful ways; in a review of 23 published turmeric liver-injury cases, most patients were also taking at least one other medication.[1][4]

Who should be careful

  • Liver symptoms. Turmeric products have been linked to dozens of cases of acute liver injury, including hospitalisations and a death. NCCIH advises stopping turmeric or curcumin immediately and contacting a provider if fatigue, nausea, poor appetite, dark urine or yellowing of the skin or eyes appear.[1][2][3]
  • High-bioavailability or black pepper products. Liver damage has been reported with bioavailable curcumin formulations; 3 of 7 products tested in US liver-injury cases also contained piperine.[1][3]
  • Pregnancy and breastfeeding. NCCIH says turmeric supplements may be unsafe in pregnancy, and little is known about amounts above food levels while breastfeeding.[1]
  • Before you start. Talk to your pharmacist or clinician before adding this supplement, especially if you take prescription medicines, are pregnant or breastfeeding, or have a chronic health condition.[1]

Full Turmeric and curcumin safety section

The evidence, graded

Pulled from our monograph evidence tables. Grades follow our evidence-grading policy.

  • Grade BImprovedKnee joint pain and functionTurmeric and curcumin · Meta-analysis · n=1,009 · 2018 · PMID 29622343Curcuminoid formulations relieved knee pain and improved function more than placebo, with no difference in safety outcomes.
  • Grade CWorsenedPost-exercise muscle soreness and damage markersTurmeric and curcumin · Meta-analysis · n=349 · 2024 · PMID 39008500Curcumin reduced muscle soreness (MD -0.61) and creatine kinase (MD -137.32), lowered IL-6 and improved range of motion versus control.
  • Grade CNo effectGlobal cognitionTurmeric and curcumin · Meta-analysis · n=531 · 2025 · PMID 40579315No significant effect on global cognition versus placebo (SMD 0.14). Subgroups showed better working memory and processing speed. Adverse events were more frequent with curcumin than with control.

The agency view

NCCIH says there is not enough evidence to conclude that turmeric or curcumin benefits any health purpose [1].

Knee comfort

A 2018 meta-analysis of trials in adults with knee osteoarthritis found curcuminoid formulations improved pain and function more than placebo, with no difference in safety outcomes [2]. Study quality was low and most trials were small, and the authors said the evidence was not adequate for practice recommendations [2].

Exercise soreness

A 2024 meta-analysis of 14 studies (349 participants) found curcumin lowered muscle soreness and creatine kinase and improved range of motion after muscle-damaging exercise, with high heterogeneity across several analyses [3].

Memory and thinking

A 2025 meta-analysis of 10 human studies (531 people) found no significant effect on global cognition (SMD 0.14), and adverse events were more frequent with curcumin than with control [4]. Large effects seen in rodents were not reproduced in people [4].

Before trying it, read turmeric with black pepper and liver safety.

Quick answers

Is turmeric good for inflammation?

NCCIH says the evidence is not enough to conclude benefit for any health purpose [1]. In exercise studies, curcumin lowered the inflammatory marker IL-6 [3].

Does curcumin improve memory?

Across 10 human studies, global cognition did not change significantly [4].

Is cooking with turmeric the same as a supplement?

Trials tested curcumin or curcuminoid products, not turmeric in food [2][3].

Keep reading

Full monographs

Related articles

Browse the full Supplement & Nutrient Encyclopedia or all supplement articles.

References

  1. [1]Turmeric: Usefulness and Safety (last updated April 2025). National Center for Complementary and Integrative Health, 2025.
  2. [2]Efficacy of curcumin and Boswellia for knee osteoarthritis: Systematic review and meta-analysis. Semin Arthritis Rheum, 2018. PMID 29622343
  3. [3]Meta-analysis of the effect of curcumin supplementation on skeletal muscle damage status. PLoS One, 2024. PMID 39008500
  4. [4]Targeting cognitive aging with curcumin supplementation: A systematic review and meta-analysis. J Prev Alzheimers Dis, 2025. PMID 40579315

Turmeric and curcumin and other dietary supplements are not intended to diagnose, treat, cure or prevent any disease, and these statements have not been evaluated by the FDA. Talk to your clinician or pharmacist before starting a supplement, especially if you take prescription medicines. This page has no product or affiliate links.