Supplements
curcumin decreases inflammatory biomarkers
In plain terms: Does turmeric/curcumin meaningfully lower inflammation in people?
Part of: 🧪 turmeric & curcumin
Partly — pooled trials show curcumin lowers CRP/IL-6, but the evidence is low-certainty, heterogeneous, publication-biased, and null in the most rigorous analyses.
📅 Last reviewed: 2026-07-14 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: All trials, pooled (Meta-analysis)
How the studies fall
The evidence (16)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Gorabi 2022 · Phytother Res | meta-analysis | supports | moderate | Updated meta-analysis showed curcumin significantly lowered CRP and hs-CRP, with stronger effects at longer durations. |
| Qiu 2023 · Frontiers in Endocrinology | meta-analysis | mixed | low | In metabolic syndrome patients, curcumin improved inflammatory and oxidative stress indices, but the evidence base was small and low-certainty. |
| Sahebkar 2014 · Phytotherapy Research | meta-analysis | mixed | moderate | Curcuminoids lowered circulating CRP overall but findings across clinical trials were inconsistent, dependent on formulation and bioavailability. |
| Liu 2025 · Inflammopharmacology | meta-analysis | tested-null | moderate | Curcumin/Curcuma longa extract significantly reduced inflammatory biomarkers in RA and SLE patients across pooled RCTs. |
| White 2019 · Pharmacological Research | meta-analysis | tested-null | high | In the most rigorous analysis, oral turmeric/curcumin did not significantly decrease CRP, hsCRP, IL-1, IL-6, or TNF-alpha in patients with chronic inflammatory diseases. |
| Kavyani 2024 · Prostaglandins Other Lipid Mediat | meta-analysis | supports | moderate | Umbrella meta-analysis of 21 meta-analyses found curcumin significantly reduced CRP, IL-6 and TNF-alpha and improved endothelial markers. |
| Yaikwawong 2026 · Int J Mol Sci | RCT | supports | moderate | In obese type 2 diabetes patients curcumin reduced inflammation and neutrophil-to-lymphocyte ratio versus placebo. |
| Dehzad 2023 · Cytokine | meta-analysis | supports | moderate | Across 66 RCTs, turmeric/curcumin significantly reduced CRP (-0.58 mg/L), TNF-alpha, and IL-6, though with high between-study heterogeneity. |
| Hsueh 2025 · BMC Complement Med Ther | meta-analysis | mixed | low | In knee osteoarthritis RCTs curcumin lowered some serum inflammatory markers but effects were inconsistent across biomarkers. |
| Ghoflchi S et al 2026 · study_type: meta-analysis | meta-analysis | mixed | low | Meta-analysis of 7 RCTs (453 T2DM patients): nanocurcumin showed no statistically significant reduction in CRP (SMD -0.78, 95% CI -1.58 to 0.05), despite improved bioavailability via nanoformulation. Only antioxidant markers (TAC, MDA) impr |
| Bahari 2025 · Inflammopharmacology | meta-analysis | supports | low | In prediabetes/diabetes, curcumin significantly reduced CRP, TNF-alpha, and IL-6, but overall certainty was rated low with detected publication bias for CRP. |
| Askari MA et al 2026 · study_type: RCT | RCT | supports | moderate | RCT (n=60 migraine patients): 8 weeks of Mixodin (300mg curcumin + gingerol + piperine) significantly reduced serum hs-CRP vs placebo (P=0.001). Confounded by co-administered gingerol/piperine, so effect cannot be attributed to curcumin alo |
| Tabrizi 2019 · Phytother Res | meta-analysis | supports | moderate | Curcumin supplementation significantly decreased IL-6, hs-CRP and MDA across 15 RCTs though TNF-alpha was unchanged. |
| Pan C et al 2026 · study_type: RCT | meta-analysis | supports | moderate | Systematic review of 20 RCTs (curcumin 500-1500mg/day + piperine): 15/20 trials showed significant decreases in CRP, hs-CRP, and IL-6. Bioavailability was piperine-enhanced (not curcumin alone), and formulations/doses varied widely across s |
| Bourbour F et al 2026 · study_type: RCT | RCT | supports | moderate | Double-blind RCT (n=57, Hashimoto's thyroiditis): 1500mg/day curcumin added to an anti-inflammatory diet significantly reduced IL-6 (p=0.009) and NF-κB (p=0.019) vs placebo; hs-CRP fell numerically but was not statistically significant (p=0 |
| Lee 2024 · Nutrients | meta-analysis | supports | moderate | Review of meta-analyses of RCTs found curcumin's anti-inflammatory effects on chronic metabolic disease real but heterogeneous and formulation-dependent. |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.