This Podcast Will Kill You
This Podcast Will Kill You

Special Episode: Deborah Cohen & Bad Influence

August 11, 2026

AI Summary

5 min read

When Health Advice Comes with a Hidden Price Tag

Dr. Deborah Cohen, a medically trained journalist and author of Bad Influence: How the Internet Hijacked Our Health, traces the origins of her book to a family party in Liverpool. A cousin's friend had just spent £160 on an AMH test—a blood test marketed to tell women about their fertility. When Cohen asked what she would do with the results, the woman said she would take them to her GP. Cohen's response was blunt: the GP couldn't use those results because the test doesn't actually measure fertility. "You just wasted £160," she told her. The woman had gotten the recommendation from Instagram.

That moment crystallized something Cohen had been watching for years. Friends with university degrees—smart, educated people—were turning to social media for guidance on hormone replacement therapy, testosterone, full-body screening, and ADHD diagnoses. The pattern was consistent: traditional healthcare couldn't provide the answers people wanted, so they went looking elsewhere. And online, there was always someone ready to sell them a solution.

The New Commercial Players in Your Feed

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What you'll learn

  • 1 (02:30) **Introduction & Book Setup** - Aaron Welsh introduces the TPWKY Book Club series and today’s guest, Dr. Deborah Cohen, author of *Bad Influence*.
  • 2 (07:08) **The Origin Story: Cousin’s AMH Test** - Dr. Cohen shares the real-life spark that made her write the book.
  • 3 (11:02) **Who Are the Bad Influencers?** - Mapping the major actors and industries shaping our health online.
  • 4 (17:05) **The Nocebo Effect and Social Media** - How seeing symptoms online can create real physical experiences.
  • 5 (21:11) **Commodification of Fear and the Full-Body MRI Trap** - How anxiety is monetized.
  • 6 (23:57) **The Illusion of Truth Bias & Algorithmic Normalization** - Why repetition makes misinformation feel true.
  • 7 (28:30) **Making Nuance Clickable & The Doctor-Patient Gap** - The challenge of communicating uncertainty.

+ Full timestamped outline available in the app

Show Notes

If you have a medical question, where do you turn? How often is google or social media your first stop? As you sift through the AI overview and countless reels professing to have the answers, it becomes harder and harder to separate fact from fiction. Do these supplements actually do what they promise? Should I be wary of this commonly prescribed medication? Even if you’re not directly seeking this information, it finds you anyway, preying on health anxieties and promising an easy fix. In this week’s TPWKY book club episode, Dr. Deborah Cohen, medically-trained, award-winning journalist, broadcaster, and editor, joins me to discuss the implications of this flood of health misinformation, which she explores in her recent book Bad Influence: How the Internet Hijacked Our Health. From podcast bros touting peptide injections to TikTok influencers swearing by supplements, Cohen demonstrates that the internet is a wild west in desperate need of consumer protections. But it has also been a double-edged sword, providing community and connection alongside these bad actors. How can we continue to leverage the good of the internet to democratize health information while putting guardrails on nefarious wellness influencers hawking lies for profit? Tune in to find out.

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