Metabolic & Cardiometabolic
psychotherapy decreases inflammatory markers
In plain terms: Does talk therapy measurably reduce inflammation?
Yes, modestly — meta-analyses of dozens of RCTs find psychological therapies produce small but real reductions in inflammatory markers like IL-6 and CRP; effects are inconsistent in some settings.
📅 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
What the evidence shows
Meta-analyses of dozens of randomised trials find psychological therapies producing small but real reductions in inflammatory markers: cognitive behavioural therapy lowered interleukin-6 in depression across ten studies, and 48 mindfulness trials reduced C-reactive protein and IL-6. The effects are small and inconsistent, vanishing in some pre-post analyses.
The evidence (9)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Fiori V, Ballesio A 2026 · Behav Sleep Med | meta-analysis | mixed | low | Systematic review of RCTs found unclear and inconsistent evidence that CBT for insomnia reduces CRP, IL-6, and TNF-alpha. |
| Ma H, Xu J, Li R, McIntyre RS, Teopiz KM, Cao B, Yang F 2022 · Front Psychiatry | meta-analysis | supports | moderate | Meta-analysis of 10 studies (940 participants) found CBT significantly lowered peripheral IL-6 in depression, a small effect. |
| Yu M, Jin Y, An J, Zheng P 2025 · Neurosci Biobehav Rev | meta-analysis | mixed | low | Three-level meta-analysis found only a small immune effect in RCT post-test data that became non-significant in pre-post analyses. |
| Ballesio A, Zagaria A, Vacca M, Pariante CM, Lombardo C 2023 · Brain Behav Immun | meta-analysis | supports | moderate | Network meta-analysis of 104 RCTs found cognitive therapy and mindfulness interventions reduced proinflammatory cytokines versus controls, with high heterogeneity. |
| Dunn TJ, Dimolareva M 2022 · Clin Psychol Rev | meta-analysis | supports | moderate | Meta-analysis of 48 mindfulness RCTs found significant reductions in CRP and IL-6 post-intervention. |
| Grasmann J, Almenräder F, Voracek M, Tran US 2023 · Int J Mol Sci | meta-analysis | mixed | low | Preregistered meta-analyses found only small and inconsistent effects of mindfulness interventions on inflammation/stress biomarkers, weak in subclinical groups. |
| Huang X, Lv J, Zhu D, Peng H, Yu T 2025 · Biogerontology | meta-analysis | supports | low | Meta-analysis reported mindfulness interventions reduced inflammaging markers IL-6, TNF-alpha, and CRP. |
| Shields GS, Spahr CM, Slavich GM 2020 · JAMA Psychiatry | meta-analysis | supports | high | Meta-analysis of 56 RCTs found psychosocial interventions associated with beneficial changes in immune/inflammatory function, notably reduced proinflammatory markers. |
| Penedo FJ, Fox RS, Walsh EA, Yanez B, Miller GE, Oswald LB, Estabrook R, Chatterton RT, Mohr DC, Begale MJ, Flury SC, Perry K, Kundu SD, Moreno PI 2021 · Brain Behav Immun | RCT | contradicts | moderate | In 192 men with stage III-IV prostate cancer on androgen deprivation therapy, randomised to 10 weeks of online group cognitive behavioural stress management or an active health-promotion control, the stress-management arm did not lower inflammation relative to control. There was no group-by-time interaction for CRP, IL-6, IL-8, IL-10 or TNF-alpha; the authors conclude that contrary to hypotheses the therapy did not change circulating inflammatory markers relative to health promotion. TNF-alpha, IL-8 and IL-10 fell in both arms at 6 months and rebounded by 12 months, which without a usual-care arm cannot be separated from the passage of time. A single between-group IL-6 difference at 12 months (p = .042) sat alongside no interaction. |
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.