Research

Hormonal

Obesity and post-diagnosis weight gain in breast cancer patients are associated with significantly increased risks of disease recurrence and mortality.

For breast cancer patients, maintaining a healthy weight or losing weight if overweight is critical for reducing the risk of recurrence and death. This is not just about aesthetics; it is a clinical priority supported by strong observational data and hormonal mechanisms. Patients should engage in weight loss programs combining diet, physical activity, and behavioral therapy.

GoodSupportsHIGH confidence
women with breast cancer who are overweight or gain weight after diagnosis are found to be at greater risk for breast cancer recurrence and death compared with lighter women.
Rowan T. Chlebowski et al. · Journal of Clinical Oncology · 2002

Why this rating

Based on a systematic review of 34 studies (29,460 women) and a meta-analysis showing statistically significant hazard ratios.

Source

Weight Loss in Breast Cancer Patient Management

Rowan T. Chlebowski et al. · Journal of Clinical Oncology · 2002

DOI 10.1200/jco.2002.20.4.1128

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DOI resolved against Crossref · corpus check 2026-06-10

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