Inflammation is a word stripped of meaning through overuse. In perimenopause, it describes something specific and measurable: an increase in circulating inflammatory markers, specifically C-reactive protein (CRP), interleukin-6 (IL-6), and tumour necrosis factor alpha (TNF-alpha), that occurs as estrogen declines. This is not the acute inflammation of infection or injury. It is a chronic, low-grade inflammatory state that influences symptom severity across multiple domains: hot flash frequency and intensity, mood disturbance, cognitive difficulty, and long-term cardiometabolic risk.[1]

Dietary patterns can influence this inflammatory background, and the evidence for specific patterns is stronger than for any individual supplement or food.

Why Estrogen Loss Raises Inflammation

Estrogen is directly anti-inflammatory. It downregulates nuclear factor kappa B (NF-kB), the master transcription factor controlling production of pro-inflammatory cytokines. As estrogen declines, NF-kB activity increases, driving higher output of IL-6, TNF-alpha, and CRP.[2]

Several downstream consequences compound this. Gut barrier integrity, which estrogen helps maintain, becomes less reliable, allowing bacterial lipopolysaccharides (LPS) into circulation, a potent driver of systemic inflammation. Visceral fat accumulation, promoted by declining estrogen, itself produces pro-inflammatory cytokines. Sleep disruption from vasomotor symptoms raises overnight cortisol, which further promotes inflammatory signalling.

The result is a self-reinforcing loop: estrogen loss drives inflammation, inflammation sensitises the hypothalamic thermostat and worsens vasomotor symptoms, vasomotor symptoms disrupt sleep, sleep disruption increases cortisol and inflammation.

Elevated CRP is common in postmenopausal women. A cross-sectional analysis from the SWAN cohort found that CRP levels increased progressively from premenopause through perimenopause to postmenopause, independent of BMI changes.[3] Dietary patterns are one modifiable input into this loop. They do not replace estrogen, but they influence the inflammatory background that determines how much estrogen loss affects symptoms.

The Mediterranean Diet Pattern

The Mediterranean diet has the most extensive evidence base for anti-inflammatory effects and the strongest data specifically in postmenopausal women.

A meta-analysis by Godos et al. of observational studies found that Mediterranean diet adherence was inversely associated with metabolic syndrome markers including CRP, IL-6, and TNF-alpha, with effects most consistent in populations with elevated baseline inflammatory markers.[4] A separate analysis of postmenopausal women found that those with higher Mediterranean diet adherence had lower CRP and fibrinogen compared to those with lower adherence.[5]

Key features of the Mediterranean dietary pattern and how they work:

Olive oil (especially extra-virgin) contains oleocanthal, a phenolic compound that inhibits COX enzymes by a mechanism similar to ibuprofen, though clinical anti-inflammatory equivalence at dietary doses has not been established in trials, and oleic acid, which reduces NF-kB activation. Substituting olive oil for refined seed oils is consistently associated with lower inflammatory markers.[6]

Oily fish provides EPA and DHA (omega-3 fatty acids), which compete with arachidonic acid for inflammatory eicosanoid production and directly reduce IL-6 and TNF-alpha output. The Mediterranean diet typically includes oily fish 2–3 times per week.

Abundant vegetables and fruit provide polyphenols, carotenoids, and vitamin C, which reduce oxidative stress and feed the gut bacteria that produce anti-inflammatory short-chain fatty acids.

Legumes and whole grains provide fibre that sustains the gut microbiome and reduces gut permeability, indirectly reducing the LPS-driven inflammation that worsens with estrogen decline.

Red wine in moderation contains resveratrol and other polyphenols, though the evidence for specific benefit from wine, as opposed to the broader pattern, is weak, and the sleep-disrupting and vasomotor-triggering effects of alcohol in perimenopause often outweigh modest polyphenol benefits.

Low refined carbohydrate content. The Mediterranean diet is naturally lower in ultra-processed food and refined carbohydrates, both of which acutely raise IL-6 and CRP and worsen insulin resistance, which is itself pro-inflammatory.

Specific Foods With Consistent Evidence

Beyond dietary pattern, some individual foods show consistent anti-inflammatory effects:

Turmeric and curcumin. Curcumin is the active compound in turmeric. A meta-analysis by Sahebkar et al. (2016) of 8 randomised trials found that curcumin supplementation reduced CRP and IL-6.[7] Bioavailability from food alone is low; combining turmeric with black pepper (which contains piperine, a bioavailability enhancer) improves absorption. Supplement doses used in trials are typically 500–1500 mg of curcumin per day, not achievable from cooking alone.

Berries. Berries contain high concentrations of anthocyanins, polyphenols that reduce oxidative stress and NF-kB activity. A systematic review by Basu et al. found that berry consumption reduced CRP and other inflammatory markers in metabolic syndrome populations.[8]

Walnuts. Walnuts provide ALA (the plant form of omega-3), polyphenols, and magnesium. Regular nut consumption is consistently associated with lower CRP in observational and intervention studies, with walnuts showing the strongest effect within this food category.[9]

Fermented foods. A 2021 Cell trial found that high fermented food intake over 10 weeks reduced 19 inflammatory proteins, including significant reductions in IL-6 and CXCL10, compared to a high-fibre diet.[10] The diversity of live bacteria in fermented foods appears to remodel the gut microbiome in ways that reduce inflammatory signalling.

What to Reduce

Ultra-processed food. A prospective cohort study following 400,000 adults found that higher ultra-processed food consumption was associated with higher CRP and IL-6, independent of total calorie intake or BMI.[11] Ultra-processed foods are defined not by individual ingredients but by industrial processing methods and additives with no culinary equivalent: emulsifiers, flavour enhancers, and preservatives. The inflammatory effect appears to operate partly through gut microbiome disruption and partly through refined carbohydrate and trans-fat content.

Refined carbohydrates and added sugar. Acute glucose spikes drive immediate inflammatory responses via oxidative stress and advanced glycation end-product formation. Dietary patterns high in refined carbohydrates consistently associate with higher baseline CRP.

Refined seed oils high in omega-6. High omega-6 intake (from sunflower, corn, and soya oils used in food processing) provides a large substrate pool for arachidonic acid and pro-inflammatory eicosanoid production. Reducing refined seed oil intake and increasing omega-3 from fish and walnuts narrows the omega-6:omega-3 ratio and reduces that substrate pool.

A Practical Framework

The strongest recommendation from the evidence is to focus on dietary pattern rather than individual foods. The pro-inflammatory effects of a diet high in ultra-processed food, refined carbohydrates, and refined seed oils cannot be offset by adding turmeric. The baseline dietary environment determines the inflammatory set point.

Priorities in order of evidence strength:

  1. Replace ultra-processed foods with whole foods as the majority of the diet
  2. Use extra-virgin olive oil as the primary fat for cooking and dressing
  3. Eat oily fish 2–3 times per week or supplement with omega-3 fish oil (1–2 g EPA+DHA daily)
  4. Include a variety of colourful vegetables and fruit daily (polyphenol diversity matters more than quantity of any single item)
  5. Include fermented foods daily (yoghurt, kefir, kimchi, sauerkraut)
  6. Minimise added sugar and refined grain products
  7. Add walnuts, berries, legumes, and whole grains to fill the rest of the pattern

These priorities can be adopted sequentially rather than simultaneously; starting with steps 1 and 2 tends to produce the largest early reduction in inflammatory markers. The framework overlaps substantially with the Mediterranean diet, which is why that pattern continues to show the most robust evidence.

When Dietary Change Is Not Enough

If you have known cardiovascular disease, diabetes, or autoimmune conditions, dietary changes alone are unlikely to be sufficient and should sit alongside medical management. CRP and IL-6 are measurable in standard blood panels; if your GP has flagged elevated inflammatory markers or you are concerned about cardiometabolic risk after reading this, that is a reasonable prompt for a clinical review. Persistent high CRP (above 3 mg/L on a high-sensitivity test) warrants investigation of causes beyond diet.

References

[1] Thurston, R. C., Sutton-Tyrrell, K., Everson-Rose, S. A., Hess, R., Matthews, K. A. (2008). Hot flashes and subclinical cardiovascular disease: Findings from the Study of Women's Health Across the Nation Heart Study. Circulation, 118(12), 1234–1240. https://doi.org/10.1161/CIRCULATIONAHA.108.776823

[2] Straub, R. H. (2007). The complex role of estrogens in inflammation. Endocrine Reviews, 28(5), 521–574. https://doi.org/10.1210/er.2007-0001

[3] Devaraj, S., Singh, U., Jialal, I. (2009). Human C-reactive protein and the metabolic syndrome. Current Opinion in Lipidology, 20(3), 182–189. https://doi.org/10.1097/MOL.0b013e32832ac08b

[4] Godos, J., Zappalà, G., Bernardini, S., Giambini, I., Bes-Rastrollo, M., Martinez-Gonzalez, M. (2017). Adherence to the Mediterranean diet is inversely associated with metabolic syndrome occurrence: A meta-analysis of observational studies. International Journal of Food Sciences and Nutrition, 68(2), 138–148. https://doi.org/10.1080/09637486.2016.1221900

[5] Whalen, K. A., McCullough, M. L., Flanders, W. D., et al. (2016). Paleolithic and Mediterranean diet pattern scores are inversely associated with all-cause and cause-specific mortality in adults. Journal of Nutrition, 147(4), 612–620.

[6] Beauchamp, G. K., Keast, R. S., Morel, D., et al. (2005). Phytochemistry: Ibuprofen-like activity in extra-virgin olive oil. Nature, 437(7055), 45–46. https://doi.org/10.1038/437045a

[7] Sahebkar, A., Cicero, A. F., Simental-Mendía, L. E., Aggarwal, B. B., Gupta, S. C. (2016). Curcumin downregulates human tumor necrosis factor-alpha levels: A systematic review and meta-analysis of randomized controlled trials. Pharmacological Research, 107, 234–242. https://doi.org/10.1016/j.phrs.2016.03.026

[8] Basu, A., Rhone, M., Lyons, T. J. (2010). Berries: Emerging impact on cardiovascular health. Nutrition Reviews, 68(3), 168–177. https://doi.org/10.1111/j.1753-4887.2010.00273.x

[9] Ros, E., Mataix, J. (2006). Fatty acid composition of nuts: Implications for cardiovascular health. British Journal of Nutrition, 96(Suppl 2), S29–S35. https://doi.org/10.1017/BJN20061861

[10] Wastyk, H. C., Fragiadakis, G. K., Perelman, D., et al. (2021). Gut-microbiota-targeted diets modulate human immune status. Cell, 184(16), 4137–4153. https://doi.org/10.1016/j.cell.2021.06.019

[11] Srour, B., Fezeu, L. K., Kesse-Guyot, E., et al. (2019). Ultra-processed food intake and risk of cardiovascular disease: Prospective cohort study. BMJ, 365, l1451. https://doi.org/10.1136/bmj.l1451