Is there new evidence linking long-term estrogen use to breast cancer?

A customer recently shared that her doctor believes estrogen is safe and has helped millions of women with menopausal symptoms. Her doctor also feels that some studies linking estrogen to breast cancer risk are flawed, and based on that guidance, she decided to continue using estrogen therapy.

We respect the role of healthcare providers and support every woman’s right to make informed decisions with her doctor. At the same time, we wanted to better understand the current research, so we asked ChatGPT:

“Is there new evidence linking long-term estrogen use to breast cancer?”

The response noted that newer studies suggest estrogen may play a more direct role in breast cancer development than previously understood, and that some long-term hormone therapy studies have shown an increased breast cancer risk depending on the type and duration of use. It also emphasized that the relationship is complex and that decisions about hormone therapy should be personalized based on each woman’s medical history and risk factors.

Here is the link to the article from Harvard Gazette:

https://news.harvard.edu/gazette/story/2023/05/estrogen-a-more-powerful-breast-cancer-culprit-than-we-realized/

This article shows you how drug companies use tactics to generate false information on the safety of estrogen to sell more drugs:

Estrogen Safety: How to Separate Solid Science from Industry Spin?

May 19, 2026

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