107: Estrogen Myths & Bioidentical Truths with Jeffrey Dach, MD (Part 1)

18 Aug 2025 · 71 min
1:10:41

Part 1 of a recorded interview between Jenn Simmons, MD and Jeffrey Dach, MD exploring bioidentical hormone replacement and reexamining the role of estrogen in breast cancer. Dach challenges the conventional view that estrogen causes breast cancer, discusses ERα (proliferative) vs ERβ (tumor-suppressive), reviews historical and WHI trial data (including later follow-ups), and outlines preventive strategies (iodine testing/supplementation, progesterone, testosterone, aromatase considerations). The episode mixes clinical opinion, summary of research findings, and practical interventions; a Part 2 follow-up is promised.

Questions this video answers

ERα in 1986 and ERβ in 1996.

First arm published in 2002; second arm published in 2004.

A 45% reduction in breast cancer mortality (reported from the 18-year follow-up).

A 74% reduction in breast cancer mortality for women who had a pregnancy after diagnosis.

Iodoral tablets are discussed; each tablet is 12.5 milligrams.

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