Metabolic & Cardiometabolic
PCOS increases chronic inflammation
Part of: • PCOS
📅 Last reviewed: 2026-07-15 ⓘ
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
What the evidence shows
PCOS is associated with elevated low-grade inflammation (CRP).
The evidence (9)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Jin C et al 2026 · study_type: observational | observational | supports | large retrospective case-control (n=2,006 PCOS vs 10,038 controls); ESR (not CRP/IL-6) as marker; single-center-style automated lab pipeline | PCOS women had significantly elevated ESR vs controls across ALL age/BMI strata; higher hyper-ESR (>20mm/h) prevalence; low discriminative AUC for PCOS. |
| Butler AE, Atkin SL, et al. 2025 · Int J Mol Sci | observational | mixed | moderate | CRP did NOT differ by PCOS status in non-obese, non-insulin-resistant women → CRP elevation is BMI-driven. |
| Buia V et al 2026 · study_type: observational | observational | supports | case-control, n=70 PCOS vs 70 controls, stratified by BMI (<25 vs >=25), ELISA in follicular fluid | HMGB1 increased in PCOS vs controls overall; in the BMI-matched under/normal-weight (<25) stratum, IGF-II and IGFBP-4 still lower and IGFBP-7 higher in PCOS vs controls. |
| Atheeb AK et al 2026 · study_type: observational | observational | supports | case-control, n=50 PCOS vs 40 controls, Iraqi cohort, ELISA measured | Serum HMGB1, sTLR4, and IFN-b significantly elevated in PCOS vs controls, consistent with low-grade inflammation (no BMI-matching stated). |
| Alataş H et al 2026 · study_type: observational | observational | supports | cross-sectional, n=129 PCOS vs 135 age-matched controls (not BMI-matched) | NLR elevated in PCOS vs controls (2.09 vs 1.63); HOMA-IR ~2x higher (3.52 vs 1.98); inflammation partly mediates PCOS-IR link via SEM. |
| Aboeldalyl S, et al. 2021 · Int J Mol Sci | meta-analysis | supports | moderate | CRP significantly elevated in PCOS vs controls; partly adiposity-driven. |
| Adhami K et al 2026 · study_type: observational | observational | supports | case-control (small, n unspecified in abstract) measuring exosomal mRNA IL-6/TGF-b1; no BMI-matching stated | Exosomal IL-6 and TGF-b1 mRNA significantly upregulated in PCOS vs healthy controls (no raw values/CI given). |
| Kagitci M et al 2026 · study_type: observational | observational | supports | case-control, n=44 PCOS vs 44 age-matched controls (Rotterdam criteria); BMI included only as a covariate in combined ROC model, not matched | Serum IL-39 significantly higher in PCOS vs controls (p<0.001); independent predictor in multivariable analysis; AUC=0.74 alone, 0.78 with BMI/LH/age. |
| Azarbayjani K et al] # corrected 2026-08-17 from PubMed; was [et al. 2024 · Sci Rep | observational | mixed | low | IL-6 higher (4.94 vs 3.48, p<0.001) but CRP NOT significantly different between groups. |
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