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Healthy diet significantly decreases C-reactive protein levels in women with breast cancerHealthy Eating Habits May Lower Inflammation Markers in Women with Breast Cancer

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Key Takeaway
Consider a healthy diet as a potential intervention to decrease C-reactive protein levels in women with breast cancer.

This meta-analysis synthesized data from 11 trials to evaluate the impact of a healthy diet on inflammatory markers in women with breast cancer. The primary outcome measured was C-reactive protein (CRP) levels. The analysis found that a healthy diet significantly decreased CRP levels compared to control groups, with a standard mean difference of -0.17 (95% CI -0.32 to -0.02; I2 = 0.00%).

The authors suggest that secondary factors such as weight loss, physical activity, and the duration of the intervention may influence these findings. The association between dietary intervention and reduced CRP was noted as significant across various subgroups including those involving weight loss and physical activity.

Limitations include unspecified heterogeneity for individual trials and a lack of detailed results regarding publication bias assessments. While the data suggests that adhering to a healthy diet could decrease CRP levels, it is important to note that this finding relates specifically to a biomarker rather than a definitive clinical cure or specific outcome improvement.

How this fits prior evidence

This meta-analysis addresses a gap in understanding lifestyle interventions for breast cancer patients by focusing on inflammatory biomarkers. While previous coverage noted that acupuncture reduces fatigue and improves sleep quality, this study provides evidence regarding the impact of dietary habits on C-reactive protein levels. The finding specifically highlights how nutritional factors may influence systemic inflammation in this patient population.

A review of eleven different trials looked at how eating habits affect health markers. The study focused on women dealing with breast cancer and measured their levels of C-reactive protein, which is a common sign of inflammation in the body.

The results showed that those who followed a healthy diet had significantly lower levels of this inflammatory marker compared to those who did not. This suggests that nutrition plays an important role in managing internal inflammation during treatment.

Other factors like losing weight and staying active also seemed to play a part in these positive results. The study noted that the benefits were consistent across different groups, including those who stayed on their healthy eating plans for at least six months.

While more research is needed to see exactly how much of this change comes from specific foods, the overall evidence points toward better nutrition as a helpful tool. Doctors may suggest these dietary changes to help manage inflammation and support general well-being.

What this means for you:
A healthy diet can significantly lower inflammation markers in women with breast cancer.

Common questions

What is C-reactive protein (CRP)?

CRP is a substance in the blood that shows inflammation in the body. High levels are linked to worse outcomes in some cancers, including breast cancer.

Does this mean diet can cure breast cancer?

No. The study only looked at a marker of inflammation, not cancer outcomes. A healthy diet may help, but it is not a cure or replacement for medical treatment.

How long did participants follow the diet?

All studies included in the analysis had a minimum follow-up of six months. The effect on CRP was seen across this time frame.

Were there any side effects from the diet?

The analysis did not report any side effects, serious adverse events, or how well participants tolerated the diet. Safety information was not available.

Study Details

Study typeMeta analysis
EvidenceLevel 1
Follow-up6.0 mo
PublishedJul 2026
View Original Abstract ↓
CONTEXT: Improving the prognosis of breast cancer remains a challenge despite the reduction in its mortality rates. Inflammatory parameters have been suggested as prognostic biomarkers of cancer. A healthy diet could potentially modify these factors; however, to date, findings have been inconclusive. OBJECTIVE: This review was conducted to estimate the strength of the association between healthy dietary interventions and inflammatory markers in women with breast cancer after a minimum 6-month follow-up. DATA SOURCES: The following literature databases were searched: MEDLINE, Embase, Scopus, Web of Science, and the Cochrane Library. DATA EXTRACTION: Clinical trials that compared the effect of dietary interventions on the inflammatory profile of patients with breast cancer were selected. Quality was assessed using the Cochrane Collaboration risk-of-bias tool. Two researchers independently selected and evaluated the quality of the studies based on eligibility criteria. DATA ANALYSIS: Mean differences between intervention groups and their 95% CIs were calculated using a random-effects model. The presence of heterogeneity was analyzed with Cochran's Q test, and I2 was estimated. Funnel plots and Egger's test were used to assess publication bias. RESULTS: A total of 11 trials were included in the meta-analysis. Adherence to a healthy diet significantly decreased C-reactive protein (CRP) levels compared with the control group (standard mean difference = -0.17; 95% CI -0.32 to -0.02; I2 = 0.00%). This result was maintained in the interventions focused on weight loss, including only patients with overweight, those incorporating physical activity, when follow-up was restricted to 6 months, and with interventions lasting at least 6 months. CONCLUSION: Adhering to a healthy diet could decrease levels of CRP in women with breast cancer. The additional goals of weight loss in patients with overweight, the promotion of physical activity, and the duration of the dietary intervention may be relevant aspects when planning strategies for these patients. SYSTEMATIC REVIEW REGISTRATION: PROSPERO registration No. CRD42023402084.
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