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the claim

Obesity increases breast cancer risk in postmenopausal women.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
9 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that obesity increases breast cancer risk in postmenopausal women?

Yes. Multiple peer-reviewed sources, including a 38-study meta-analysis and reviews, state that obesity increases breast cancer risk in postmenopausal women, with some quantifying a 50%-250% higher risk. A few items address central obesity or specific populations rather than obesity generally.

Verdict: SUPPORTED · 9 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 9
Obesity and the Risk for Premenopausal and Postmenopausal Breast Cancer
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Obesity and the Risk for Premenopausal and Postmenopausal Breast Cancer. (n.d.). cir.nii.ac.jp. https://doi.org/10.1158/1940-6207.capr-12-0091

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More for · 8
Obesity as potential breast cancer risk factor for postmenopausal women -
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Obesity as potential breast cancer risk factor for postmenopausal women - PMC Lock. (n.d.). pmc.ncbi.nlm.nih.gov. https://doi.org/10.1016/j.gendis.2019.09.006

Behavioral Risk Factors in Breast Cancer: Can Risk Be Modified?
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Behavioral Risk Factors in Breast Cancer: Can Risk Be Modified?. (n.d.). cir.nii.ac.jp. https://doi.org/10.1634/theoncologist.8-4-326

Central obesity increases the risk of breast cancer irrespective of menopausal status in women: Systematic review and meta-analysis.
2025
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Motuma, A., Mussa, I., Deressa, A., Regassa, L., & Birhanu, A. (2025). Central obesity increases the risk of breast cancer irrespective of menopausal status in women: Systematic review and meta-analysis.. doi.org. https://doi.org/10.1016/j.ctarc.2025.100965

Review article: Obesity as a risk factor for development and poor prognosis of breast cancer
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Review article: Obesity as a risk factor for development and poor prognosis of breast cancer. (n.d.). cir.nii.ac.jp. https://doi.org/10.1111/j.1471-0528.2006.01021.x

Central obesity increases risk of breast cancer irrespective of menopausal and hormonal receptor status in women of South Asian Ethnicity
2016
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Nagrani, R., Mhatre, S., Rajaraman, P., Soerjomataram, I., Boffetta, P., Gupta, S., Parmar, V., Badwe, R., & Dikshit, R. (2016). Central obesity increases risk of breast cancer irrespective of menopausal and hormonal receptor status in women of South Asian Ethnicity. doi.org. https://doi.org/10.1016/j.ejca.2016.07.022

Shift work, body mass index and associated breast cancer risks in postmenopausal women.
2023
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Świątkowska, B., Szkiela, M., Zajdel, R., Gworys, K., & Kaleta, D. (2023). Shift work, body mass index and associated breast cancer risks in postmenopausal women.. doi.org. https://doi.org/10.26444/aaem/168414

Breast cancer and obesity: in vitro interferences between adipokines and proangiogenic features and/or antitumor therapies?
2013
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Breast cancer and obesity: in vitro interferences between adipokines and proangiogenic features and/or antitumor therapies?. (2013). hal.inrae.fr. https://doi.org/10.1371/journal.pone.0058541

Dietary fat without body weight gain increases in vivo MCF-7 human breast cancer cell growth and decreases natural killer cell cytotoxicity
2013
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Dietary fat without body weight gain increases in vivo MCF-7 human breast cancer cell growth and decreases natural killer cell cytotoxicity. (2013). hal.science. https://doi.org/10.1002/mc.22074

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