Modern Wisdom #769 - Dr Shanna Swan - Why Are Men’s Testosterone Levels Plummeting?
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Apr 11, 2024 
Dr. Shanna Swan, a Professor at the Icahn School of Medicine and renowned environmental and reproductive epidemiologist, discusses the alarming decline in testosterone levels and its wide-ranging implications for reproductive health. She explores how endocrine disruptors like phthalates affect fertility and what men can do to improve sperm count. The conversation delves into the global decline of sperm counts, societal pressures, and practical tips to minimize chemical exposure. Listeners will gain insights into the connection between modern lifestyles and hormonal health.
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Declining Libido in Japan
- In Japan, declining libido manifests in phenomena like "rent-a-family" services and self-marriage ceremonies.
- These trends highlight a societal shift away from traditional relationships and sexual activity.
Hormones and Lifespan
- Studies show a link between low sperm count/infertility and shorter lifespan in both men and women.
- Impaired hormone systems increase risks of heart disease, reproductive cancers, leading to earlier mortality.
Declining Sperm Count
- Sperm counts have been declining by about 1% per year since 1973, and the decline is not stopping.
- A recent study showed a 2% yearly decline after 2000, indicating a worsening trend.
