Does curcumin supplementation effectively reduce systemic inflammatory mediators in humans?
High-Bioavailability Curcumin, a systematic review and meta-analysis (Nutr Rev 2021, PMID 34378053) — pooled data from 28 meta-analyzed trials (N = 2,038 participants) showed that curcumin supplementation significantly reduced C-reactive protein (-1.55 mg/L), interleukin-6 (-1.69 pg/mL), tumor necrosis factor " (-3.13 pg/mL), IL-8 (-0.54 pg/mL), and monocyte chemoattractant protein-1 (-2.48 pg/mL). Reported result: but had no effect on intracellular adhesion molecule-1.
Source: Nutr Rev 2021, PMID 34378053 ↗ · Research map · How Magellan grades evidence · evidence confidence: high
Nutr Rev · 2021 · PMID 34378053 · DOI 10.1093/nutrit/nuaa114
Curcumin supplementation can reduce several markers of inflammation in humans, but more research is needed to determine optimal usage.
The question
Does curcumin supplementation effectively reduce systemic inflammatory mediators in humans?
What they tested
The study implicitly hypothesizes that curcumin, a known anti-inflammatory agent in preclinical research, will demonstrate efficacy in reducing systemic inflammatory mediators in humans.
How they did it
This systematic review and meta-analysis searched Medline, CINAHL, EMBASE, Scopus, and Cochrane databases for randomized controlled trials from 1980 to May 2019. Eligible studies investigated dietary curcumin's effects on inflammatory mediators in humans not receiving anti-inflammatory treatment. Two authors independently screened articles, and evidence quality was appraised using the Quality Criteria Checklist for Primary Research. Thirty-two trials were included, and 28 were meta-analyzed using a random-effects model.
What they found
Pooled data from 28 meta-analyzed trials (N = 2,038 participants) showed that curcumin supplementation significantly reduced C-reactive protein (-1.55 mg/L), interleukin-6 (-1.69 pg/mL), tumor necrosis factor " (-3.13 pg/mL), IL-8 (-0.54 pg/mL), and monocyte chemoattractant protein-1 (-2.48 pg/mL). It also increased IL-10 (0.49 pg/mL), but had no effect on intracellular adhesion molecule-1.
| C-reactive protein | -1.55 | |
|---|---|---|
| Interleukin-6 | -1.69 | |
| Tumor necrosis factor ", | -3.13 | |
| IL-8 | -0.54 | |
| Monocyte chemoattractant protein-1 | -2.48 | |
| IL-10 | 0.49 |
Weighted mean difference in inflammatory mediators after curcumin supplementation.
What it means
Curcumin supplementation demonstrates anti-inflammatory effects by reducing several systemic inflammatory mediators and increasing IL-10. Further research is needed to optimize dose, duration, and formulation for chronic inflammation in humans.
Limitations
The abstract does not explicitly state limitations of the review, but it does highlight that clinical evidence for curcumin remains inconclusive due to discrepancies regarding optimal dosage, duration, and formulation, suggesting these are areas needing further clarification.
Where the published abstract does not list limitations, we say so rather than inventing them. Read the full paper on PubMed before drawing conclusions.
The paper at a glance
| Magellan’s evidence label | lowers CRP, IL-6, TNF-alpha (our label for this citation — see PubMed for the paper’s own title and authors) |
|---|---|
| Journal | Nutr Rev |
| Year | 2021 |
| PMID | 34378053 ↗ |
| DOI | 10.1093/nutrit/nuaa114 ↗ |
| Topic | Immunity, inflammation & resilience |
Read the source: PubMed record (authors, abstract, full citation) ↗ · Publisher via doi.org ↗
Where Magellan uses this paper
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High-Bioavailability Curcumin
Meta-analyses of randomized controlled trials generally find that curcumin/turmeric supplementation lowers CRP, IL-6 and TNF-alpha and improves oxidative-stress markers, with symptomatic benefits reported in osteoarthritis and rheumatoid arthritis, modest LDL-cholesterol and triglyceride reductions in cardiometabolic…
Curcumin is the principal curcuminoid and yellow pigment of turmeric (Curcuma longa), a rhizome long…
Research describes the compound or intervention studied. It is not a claim about any specific product.
Molecules & mechanisms in this paper
Each of these is named in the paper’s own words above. Open the monograph for the full mechanism and its other citations.
Cite this page
These citations point at this summary. To cite the original paper with its full author list, use the PubMed record or doi.org.
Magellan Longevity. (2026). Does curcumin supplementation effectively reduce systemic inflammatory mediators in humans? [Plain-English summary of Nutr Rev 2021, PMID 34378053, DOI 10.1093/nutrit/nuaa114]. Magellan Longevity. https://magellanlongevity.com/study/s104.html@misc{magellan_s104,
title = {Does curcumin supplementation effectively reduce systemic inflammatory mediators in humans?},
author = {{Magellan Longevity}},
year = {2026},
howpublished = {\url{https://magellanlongevity.com/study/s104.html}},
note = {Plain-English summary of PubMed PMID 34378053; DOI 10.1093/nutrit/nuaa114; Nutr Rev 2021. Reviewed by Gabriel Radu, DO},
urldate = {2026-08-11}
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