
The Eco Well podcast Huberman x Shanna Swan Toxicologist Reacts Episode, feat Lyle Burgoon PhD
Dec 10, 2024
In this discussion, toxicologist Lyle Burgoon tackles the misinformation presented by Shanna Swan regarding phthalates and their alleged role as endocrine disruptors. He critiques the claims about feminization and the potential extinction of humans, emphasizing the need for rigorous scientific evaluation. The conversation dives into the pitfalls of confirmation bias in research, challenges in measuring biological effects in studies, and the importance of clear communication in addressing complex health issues. Burgoon advocates for improved public understanding of toxicology.
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Episode notes
Read Regression Results Carefully
- Check regression effect sizes, not just P-values, before assuming biological importance.
- Translate beta coefficients into real-world units to judge practical impact.
Small Studies Drive Unreliable Claims
- Small sample sizes (e.g., N=23) produce unstable results and high risk of sampling bias.
- Lyle shows that such studies cannot reliably support broad claims about human effects.
Low R² Means Weak Explanatory Power
- High unexplained variance (low adjusted R²) undermines model trust and P-value meaning.
- Lyle notes Swan's model explained only ~23% of variance, leaving most unexplained.












