Clear evidence. Transparent sources. Practical guidance. Our evidence policyContact
Food Health Lab
Home › Supplements › Antioxidants › Curcumin

Curcumin (turmeric)

Turmeric's active polyphenol — genuinely useful for joint pain, if you solve the absorption problem.

Reviewed by Bodil Isaksson, Licensed Biomedical Scientist (Sweden)Last reviewed July 2026Supplement guide

SupplementsAntioxidantsJointsAnti-inflammatory

Curcumin is the yellow polyphenol in turmeric, and one of the better-studied anti-inflammatory supplements. The main catch is that plain curcumin is barely absorbed.

Key takeaways

  • Curcumin is an anti-inflammatory polyphenol from turmeric.
  • Meta-analyses find it reduces knee osteoarthritis pain — comparable to NSAIDs in some trials.1
  • Plain curcumin is poorly absorbed — use formulas with piperine (black pepper) or enhanced-bioavailability curcumin.
  • Typical 500–1000 mg curcuminoids/day; generally safe.

What it is

Curcumin is the main curcuminoid in turmeric root, acting on inflammatory signalling (NF-κB and others) as well as being an antioxidant.

The evidence

Systematic reviews of randomised trials show curcumin/turmeric extracts significantly reduce knee OA pain and improve function, with efficacy similar to NSAIDs in several head-to-head studies.1 Evidence for mood and exercise recovery is more preliminary.

Dose & how to use

500–1000 mg curcuminoids/day, in a bioavailability-enhanced form (with piperine, or phytosome/nanoparticle formulations), taken with food.

Safety & who benefits

Well tolerated; high doses can cause mild GI upset, and it may interact with blood thinners. Most useful for osteoarthritis / joint pain and inflammatory conditions.

Bottom line: a legitimately useful anti-inflammatory for joint pain — but only in an absorbable form; plain turmeric capsules do little.

References

Adult research summary for education, not a prescription. These are food supplements, not treatments for disease.

  1. The efficacy of high- and low-dose curcumin in knee osteoarthritis: a systematic review and meta-analysis. 2021. pubmed.ncbi.nlm.nih.gov

This article summarises nutrition science for education. It is not a substitute for individual medical advice; consult a professional before starting a supplement, in pregnancy, or alongside medication.