Epidemiological studies have shown that SFN may reduce a woman’s chances of getting breast cancer.

The reduction varies between 20% and 50%, depending on the study.

Shortly after a woman consumes SFN, its metabolites are found in the epithelial cells of breast tissue—suggesting that SFN is rapidly bioavailable and can efficiently target these cells. 


Wu YC, Zheng D, Sun JJ, Zou ZK, Ma ZL. Meta-analysis of studies on breast cancer risk and diet in Chinese women. Int J Clin Exp Med. 2015 Jan 15;8(1):73-85. PMID: 25784976; PMCID: PMC4358431.

Zhang CX, Ho SC, Chen YM, Fu JH, Cheng SZ, Lin FY. Greater vegetable and fruit intake is associated with a lower risk of breast cancer among Chinese women. Int J Cancer. 2009 Jul 1;125(1):181-8. doi: 10.1002/ijc.24358. PMID: 19358284.

Bosetti C, Filomeno M, Riso P, Polesel J, Levi F, Talamini R, Montella M, Negri E, Franceschi S, La Vecchia C. Cruciferous vegetables and cancer risk in a network of case-control studies. Ann Oncol. 2012 Aug;23(8):2198-2203. doi: 10.1093/annonc/mdr604. Epub 2012 Feb 10. PMID: 22328735.

Terry P, Wolk A, Persson I, Magnusson C. Brassica vegetables and breast cancer risk. JAMA. 2001 Jun 20;285(23):2975-7. doi: 10.1001/jama.285.23.2975. PMID: 11410091.