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monographimageOur Mission

Zero Breast Cancer is a community based, nonprofit organization dedicated to prevention and finding the causes of breast cancer through community participation in the scientific research process. We focus on identifying environmental factors and the role they play in breast cancer at all stages of life and across generations.

Read more about what ZBC has accomplished, what we have learned and how we have applied what we have learned toward our vision of a world without breast cancer for the next generation of girls and women in our monograph



The primary purpose of Zero Breast Cancer is to prevent breast cancer. We collaborate with local and national scientists on studies designed to identify the causes of breast cancer and breast cancer recurrence. Community voice ensures research is relevant, understandable, and bidirectional. Our efforts are focused on communicating science-based findings in a clear, relevant, and reliable way to individuals and communities most likely to benefit. The end result is a greater understanding of lifestyle and environmental factors influencing breast cancer risk. We are committed to providing clear, relevant and evidence-based information that can be used to take action and make policy changes.


Recent Accomplishments

Zero Breast Cancer is the community principal investigator on a study (CYGNET) investigating the environmental factors influencing age of onset of breast development and menarche.
Findings to date have confirmed:

    • Puberty is occurring earlier in young girls which is of concern because early breast development and menarche have been linked to higher risk of breast cancer.
    • Girls living in the San Francisco Bay Area have some of the highest levels of flame retardants in the world
    • Girls living in Cincinnati have significantly higher levels of polyfluoroalkyl compounds (water contaminant) than the San Francisco Bay Area girls.

In response to these findings and other similar studies, Kaiser Permanente changed its well-child protocol to begin discussing puberty with girls seven to eight years of age as opposed to nine to ten years of age, California banned further use of flame retardants and North Kentucky changed its water purification process.

Zero Breast Cancer, in partnership with the University of California Television (UCTV) and the Breast Cancer and the Environment Research Program scientists, have helped produce 33 educational videos on breast cancer, the environment, and prevention. As of November 2013, these videos have attracted over 1.5 million web-views. You may view these videos by visiting:

With funding from the National Institute of Environmental Health Sciences, National Cancer Institute and the Avon Foundation, Zero Breast Cancer established a 20 member Youth Advisory Board of CYGNET study participants who have become well informed and articulate spokeswomen educating peers about puberty and the environment. These girls have been interviewed on “All Things Considered”, the ABC-KGO program “Beyond the Headlines”, and, most recently, the front page of the San Francisco Chronicle.

In the past year, Zero Breast Cancer has co-authored two important breast cancer reports, California Breast Cancer Mapping Project: Identifying Areas of Concern in California andBreast Cancer and the Environment: Prioritizing Prevention.

Zero Breast Cancer’s accomplishments are a reflection of the generous support we have received from individual donors and businesses over the past 18 years.