在美国，超过三分之二的成年女性超重或肥胖。虽然高体重指数（BMI）是绝经后乳腺癌的一个既定危险因素，但还没有足够的证据来确定这种风险是否可以通过减肥来逆转。一项大型的新研究发现，持续减肥的女性患乳腺癌的风险比体重保持稳定的女性低，持续减肥的量越大，患乳腺癌的风险越低。

Large study links sustained weight loss to reduced breast cancer risk

https://www.sciencedaily.com/releases/2019/12/191217073749.htm

Journal Reference:

1. Lauren R Teras, Alpa V Patel, Molin Wang, Shiaw-Shyuan Yaun, Kristin Anderson, Roderick Brathwaite, Bette J Caan, Yu Chen, Avonne E Connor, A Heather Eliassen, Susan M Gapstur, Mia M Gaudet, Jeanine M Genkinger, Graham G Giles, I-Min Lee, Roger L Milne, Kim Robien, Norie Sawada, Howard D Sesso, Meir J Stampfer, Rulla M Tamimi, Cynthia A Thomson, Shoichiro Tsugane, Kala Visvanathan, Walter C Willett, Anne Zeleniuch-Jacquotte, Stephanie A Smith-Warner. Sustained weight loss and risk of breast cancer in women ≥50 years: a pooled analysis of prospective data. JNCI: Journal of the National Cancer Institute, 2019; DOI: 10.1093/jnci/djz226