Macro partitioning
Obesity increases the risk of triple-negative breast cancer (TNBC) in premenopausal women, primarily through abdominal (visceral) obesity rather than overall BMI.
If you are premenopausal, your waist size matters more for breast cancer risk than your overall weight. Abdominal fat is linked to a more aggressive type of breast cancer called triple-negative breast cancer. Focus on maintaining a healthy waist-to-hip ratio through diet and exercise, as this specific type of fat distribution drives risk in younger women.
growing evidence suggests that abdominal obesity, also known as central obesity, may increase risk for triple negative breast cancer, which is more common in premenopausal women. ... measures of abdominal obesity (e.g., waist circumference, waist-to-hip ratio) were associated with increased risk for premenopausal ER- breast cancer ... a significant association existed between TNBC and obesity, but when stratified by menopausal status the results were significant only among premenopausal women.
Why this rating
Supported by systematic reviews, meta-analyses, and specific cohort studies (AMBER Consortium, Carolina Breast Cancer Study).
Source
The Many Faces of Obesity and Its Influence on Breast Cancer Risk
Tanya Agurs‐Collins et al. · Frontiers in Oncology · 2019
DOI 10.3389/fonc.2019.00765
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- Obesity increases the risk of estrogen-receptor-positive (ER+) breast cancer in postmenopausal women through the 'obesity-inflammation-aromatase axis,' where visceral fat produces estrogen via the enzyme aromatase.Strong
- Weight loss significantly reduces the risk of postmenopausal breast cancer, with a dose-response relationship where greater weight loss leads to greater decreases in estrogen and increased sex hormone-binding globulin (SHBG).Good
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