Not on its own, it seems. In a 2026 randomized trial of 53 adults, 8 weeks on a provided Mediterranean diet did not change CRP. CRP fell only after two fasting days a week were added, along with more weight loss. The authors say eating less than you burn, and the weight that follows, look like the stronger drivers.
What the new study did
People on a Mediterranean diet tend to have lower inflammation markers. But they often lose weight too. Is it the food, or the weight? The trial's own abstract calls this "unclear."
So a team ran a 16-week controlled-feeding trial, published in Cell Metabolism in 2026. Fifty-three adults took part, most of them women (77%), with an average age of 54.7 and metabolic risk factors.
Half got a fully provided Mediterranean diet. The other half kept their usual western diet. After 8 weeks, both groups added two fasting days a week for another 8.
"Controlled feeding" matters: the researchers supplied the food, so they knew what people ate. The main outcome was high-sensitivity C-reactive protein, or hs-CRP, a blood test that picks up low levels of CRP, a protein the liver makes when the body is inflamed.
What it found: does fasting reduce inflammation?
For the first 8 weeks, nothing happened to CRP. The two groups ate very differently, and the marker did not budge. Blood fats did improve.
Eight weeks of a provided Mediterranean diet did not change CRP. The marker fell only after fasting days brought the weight down.From a 2026 randomized trial in Cell Metab
Then the fasting days started, and the picture changed. CRP fell in the Mediterranean group compared with the controls, alongside greater weight loss, better insulin sensitivity and lower blood pressure. Multi-omic tests, which read many layers of biology at once, showed inflammatory signaling falling in step. The gut microbiome stayed largely stable.
The authors' conclusion is plain. Diet quality alone did not lower inflammation over 8 weeks. Eating less than you burn, and the weight lost during fasting, "appear to be the stronger drivers."
What it can't tell us
This is one trial, and a small one: 53 people, 16 weeks. It needs a second trial before it becomes a rule.
Both groups fasted in the second half. So the trial compared a Mediterranean diet plus fasting with a western diet plus fasting. It did not test fasting alone against weight loss alone, which is why the authors wrote "appear to be," not "are."
Eight weeks may be too short for a diet to show up in CRP. What would 6 months of the same food do? The trial can't say. And the group was mostly women with metabolic risk factors, so men, younger adults and people without those risk factors might respond differently.
How much weight loss does it take to move CRP?
Here the older research helps. A 2007 systematic review pooled 33 weight-loss studies, lifestyle and surgical. For each kilogram lost, CRP fell by about 0.13 mg/L on average, and the link was tight: a weighted correlation of 0.85. In lifestyle programs alone the slope was shallower, about 0.06 mg/L per kilogram.
We used those two slopes to work out what a given weight loss might buy. This is our arithmetic, not the paper's.
| Weight lost | All 33 studies (0.13 mg/L per kg) | Lifestyle programs only (0.06 mg/L per kg) |
|---|---|---|
| 1 kg (about 2 pounds) | 0.13 mg/L lower CRP | 0.06 mg/L lower CRP |
| 3 kg | 0.39 mg/L | 0.18 mg/L |
| 5 kg | 0.65 mg/L | 0.30 mg/L |
For scale, a 2020 meta-analysis of 18 randomized trials found fasting and calorie-cutting diets lowered CRP by 0.024 mg/dL. That is 0.24 mg/L, about what the all-studies line predicts for 2 kg (2 x 0.13 = 0.26). Fasting and weight loss may be two names for the same lever.
How it fits with earlier research
The weight-loss record is the steadiest part. A 2018 review of 76 studies and 6,742 patients found most reported lower inflammatory cytokines after weight loss; three found no effect. Its conclusion could describe the new trial: a low-calorie diet has an anti-inflammatory effect "independent of the diet composition." More in our [weight loss explainer](/articles/does-weight-loss-reduce-inflammation).
The fasting record is messier. A 2025 network meta-analysis of 21 studies with 839 people found fasting lowered TNF-alpha and CRP but not IL-6, and the 5:2 pattern ranked highest for CRP. Yet a 2025 meta-analysis in people with overweight or obesity found no link between fasting and CRP at all; continuous calorie restriction lowered CRP and IL-6. And 17 calorie-restriction trials pooled in 2026 showed 6.29 kg of weight loss with no change in hs-CRP. On weight itself, fasting is not special. Across 99 randomized trials with 6,582 adults, every fasting strategy and continuous restriction took weight off compared with eating freely. More in [is fasting anti-inflammatory?](/articles/is-fasting-anti-inflammatory).
The Mediterranean record is the puzzle. A 2026 meta-analysis of 33 randomized trials with 3,476 people found the diet lowered hs-CRP, IL-6 and IL-17 versus a control diet. An earlier pooled analysis of 22 trials found the biggest drops of any diet pattern, but its CRP estimate ran from a 2.02 mg/L fall to a slight rise, and the trials disagreed with each other almost completely. A 2024 umbrella review of 30 meta-analyses ranked it first of 7 patterns for lowering CRP, ahead of vegetarian and energy-restricted diets, and called the evidence weak. So there is no separate "anti-inflammatory diet" in these trials, only the pattern with the best CRP record.
None of them could separate the food from the weight, and that gap is what the new trial was built to fill. Read together, they point one way: the pounds may be a big part of why the diet works. See our [Mediterranean diet explainer](/articles/is-the-mediterranean-diet-anti-inflammatory).
Should you change anything?
Tick what you'll try this week. Your picks stay on this device.
you have diabetes or take medicine for blood sugar or blood pressure (fasting days can lower both, so keep taking your medicine as prescribed and ask before changing meals around it); you are pregnant, breastfeeding or under 18; you have a history of an eating disorder; or you have kidney disease, gout or another condition where skipping meals is risky.
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How this article was made
Researched and written from 11 peer-reviewed papers. Our automated check matched every claim against the exact words of its source, confirmed every paper exists in PubMed, and found none retracted. Checked November 3, 2026. Not individually reviewed by a doctor. Photos are illustrative; the people in them are not patients or readers.
Grades run Strong, Moderate, Emerging, Early and Not supported, and the grade decides the words we may use. How we grade evidence · Medical disclaimer
Sources
- Randomized trialWeight loss during intermittent fasting, not Mediterranean diet quality alone, is associated with lower inflammation: A randomized controlled trial.Warmbrunn MV, Tosti V, Biswas RK et al. Cell Metab, 2026.PubMedFull paper
- Systematic reviewThe effect of weight loss on C-reactive protein: a systematic review.Selvin E, Paynter NP, Erlinger TP Arch Intern Med, 2007.PubMedFull paper
- Systematic reviewWeight loss is a critical factor to reduce inflammation.Bianchi VE Clin Nutr ESPEN, 2018.PubMedFull paper
- Meta-analysisEffects of intermittent fasting diets on plasma concentrations of inflammatory biomarkers: A systematic review and meta-analysis of randomized controlled trials.Wang X, Yang Q, Liao Q et al. Nutrition, 2020.PubMedFull paper
- Meta-analysisThe Effects of Intermittent Fasting on Inflammatory Markers in Adults: A Systematic Review and Pairwise and Network Meta-Analyses.Khalafi M, Habibi Maleki A, Mojtahedi S et al. Nutrients, 2025.PubMedFull paper
- Meta-analysisEffects of intermittent fasting and caloric restriction on inflammatory biomarkers in individuals with obesity/overweight: A systematic review and meta-analysis of randomized controlled trials.Aamir AB, Kumari R, Latif R et al. Obes Rev, 2025.PubMedFull paper
- Meta-analysisIntermittent fasting strategies and their effects on body weight and other cardiometabolic risk factors: systematic review and network meta-analysis of randomised clinical trials.Semnani-Azad Z, Khan TA, Chiavaroli L et al. BMJ, 2025.PubMedFull paper
- Meta-analysisEffect of monotherapeutic caloric restriction diet on cardiometabolic parameters in adults with overweight or obesity: Insights from meta-analyses of randomized controlled trials.Duc TQ, Khanh ND, Dang DK et al. J Investig Med, 2026.PubMedFull paper
- Meta-analysisMediterranean Diet Reduces Inflammation in Adults: A Systematic Review and Meta-analysis of Randomized Controlled Trials.Keshani M, Rafiee S, Heidari H et al. Nutr Rev, 2026.PubMedFull paper
- Meta-analysisEffects of Dietary Patterns on Biomarkers of Inflammation and Immune Responses: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.Koelman L, Egea Rodrigues C, Aleksandrova K Adv Nutr, 2022.PubMedFull paper
- Umbrella reviewEvaluating the effects of dietary patterns on circulating C-reactive protein levels in the general adult population: an umbrella review of meta-analyses of interventional and observational studies.Tran DQ, Nguyen Di K, Quynh Chi VT et al. Br J Nutr, 2024.PubMedFull paper
