Bad Influence: How the Internet Hijacked Our Health

Patients aren’t just turning up with symptoms anymore — they’re turning up with diagnoses, treatment plans, and a feed full of advice. In this episode, I’m joined by Deb Cohen — former BMJ investigative journalist and co-author of Bad Influence — to unpack how the internet has reshaped health information, trust, and the doctor–patient relationship. We talk about the rise of “Dr TikTok,” why algorithms feel like they know you better than you know yourself, and how perfectly reasonable curiosity can turn into confusion, anxiety, and unnecessary interventions. This isn’t about blaming people for getting it wrong. It’s about understanding the system we’re all now navigating. Deb’s book: Bad Influence: How the Internet Has Hijacked Our Health Available in hardback and audiobook Time stamps: 00:00 Podcast Welcome 01:21 Debs Journalism Journey 02:22 Pandemic Shift to Social 03:08 Dr TikTok Moment 04:18 Fertility Test Wakeup 05:10 Facebook to TikTok Era 07:40 Algorithms and Trust 12:00 Self Diagnosis Loops 16:25 NHS Distrust and Fixes 19:01 Borrowed Legitimacy 21:26 Stories vs Evidence 23:30 US Model Goes Global 26:09 Influencers Selling Drugs 28:03 Doctor Influencer Ethics 28:45 IV Drips and Red Flags 31:58 Spotting Conflicts and Hype 35:57 Tech Bro Health Mindset 37:42 Wearables Scans and Cascades 41:51 Private Tests NHS Fallout 43:41 NHS Gaps and Private Clinics 46:44 AI Regulation and Hope 49:51 Using the Internet Wisely 51:20 Book Wrap Up and Thanks