Rationale:

Factors like diet and lifestyle affect the gut microbiome (a complex of bacteria and organisms in the intestines). Your microbiome can affect estrogen levels, which is a risk factor for hormone-receptor positive breast cancer. We are comparing the gut bacteria of women with and without breast cancer to explore how therapies targeting the microbiome, like probiotics, may be used as a tool to prevent breast cancer.

Eligibility: 

• Women age 40-100 years old
• Completion of 2 minute screening survey to determine eligibility