Could Estrogen Actually Lower Your Breast Cancer Risk?

Could Estrogen Actually Lower Your Breast Cancer Risk?

Hillary Lin, MD

By 

Hillary Lin, MD

Published 

August 29, 2025

Could a hormone often feared by women actually reduce breast cancer risk? Join Dr. Hillary Lin, a Stanford-trained longevity physician with genetic risk herself, as she debunks myths, spotlights 2025 research, and reframes HRT from villain to potential health ally.

What You'll Learn:

• Insight into how estrogen and progesterone influence breast cancer—and why not all hormones are created equal

• A re-examination of the Women’s Health Initiative (WHI) findings, in context of age, timing, and hormone types

• Highlights from the E3N French study on natural (micronized) progesterone vs. synthetic progestins

• Absolute vs. relative risk explained—why HRT’s impact is often overstated

• The longevity case for HRT: bones, heart, brain, and healthspan benefits when started at “the window of opportunity”

• Real patient stories—including Dr. Lin’s own experience and how she counsels women with elevated cancer risk

• Critical caveats for breast cancer survivors and where non-hormonal alternatives come in

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