Science Friday Science Friday

Hot flashes and hormone therapy: the science of perimenopause

Sep 17, 2026 · 18m

Summary

This episode explores the science of perimenopause, featuring endocrinologists Dr. Nanette Santoro and Dr. Genevieve Neal-Perry. They discuss the fluctuating hormonal mechanisms behind symptoms like hot flashes and brain fog, and clarify why the Women’s Health Initiative study was misinterpreted, leading to a decades-long decline in hormone therapy use. The guests address current misconceptions, warning against commercialized trends and unfounded claims regarding testosterone and "bio-identical" hormones, while emphasizing that hormone therapy is a valid option for many but not a cure-all f…

Topics discussed

Sponsors and show introduction Perimenopause awareness and hormone therapy trends Introducing Dr. Santoro and Dr. Neal-Perry The reality of hormonal fluctuations during perimenopause Listener experiences: personality changes and symptoms Why some women experience more severe symptoms The neuroscience behind hot flashes and KNDy neurons Brain adaptation and the mystery of persistent hot flashes Distinguishing perimenopause from other symptoms Risk factors for early onset and racial differences Sponsor break: Better in Bed with the Sleep Doctor History of the Women's Health Initiative and its impact Re-evaluating risks and benefits based on follow-up data Concerns about commercialization and social media influence Debunking myths about bioidenticals and 'fountain of youth' claims The lack of evidence for testosterone therapy in menopause Closing remarks and guest credits Outro and sponsor: Columbia Hernia Center
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