The Peptide Lie: What a Drug Developer Reveals About the Compounds Everyone Is Injecting | Dr Leigh Baxt

About this episode

Dr Leigh Baxt discusses the science behind peptides and the discrepancies between marketed claims and evidence.

Peptides are being marketed as solutions for everything from injury recovery to longevity, but what does the science actually say? In this episode, Dr Leigh Baxt joins me to break down what peptides are, how drug development really works, and why so many of the claims circulating online are running far ahead of the evidence. We explore the difference between approved peptide medicines and unregulated products sold online, why anecdotes are not enough, and what people should understand before putting these compounds into their bodies. What We Cover What peptides are and why they are not new FDA-approved peptide drugs versus unregulated peptides sold online Why scientists are concerned about the current peptide boom How drugs are developed and why most ideas fail Why animal and cell studies are not enough to establish safety and efficacy The problem with using “natural” as a proxy for safe How to think critically about peptide marketing and anecdotal claims This is an important conversation for anyone trying to make sense of the peptide boom and separate genuine science from wellness hype. To learn more from Dr Leigh Baxt, follow her on Instagram at @sciencemomscicomm. I also…

People in this episode

Host: Simon Hill

Guest: Dr Leigh Baxt

Topics covered

• peptides
• drug development
• health claims
• safety and efficacy
• wellness hype

Keywords

• peptides
• drug development
• FDA-approved
• unregulated products
• safety
• efficacy
• wellness

Mentioned in this episode

Organizations: Unbiased Science

More episodes of The Proof with Simon Hill

• Nutrition for satiety and weight loss | Dr Federica Amati · June 9, 2026 · 1h 34m
• The Surgeon Defending Statins, GLP-1s, and Ancel Keys | Dr Terry Simpson · June 1, 2026 · 1h 43m
• Has Optimisation Culture Gone Too Far? | Sarah Ann Macklin · May 28, 2026 · 1h 11m
• What the Headlines Get Wrong About the Future of Meat | Bruce Friedrich · May 26, 2026 · 1h 48m
• Improving cholesterol and blood pressure with diet | A Masterclass · May 18, 2026 · 1h 57m
• The Peptides Quietly Accelerating Aging | Dr Valter Longo · May 11, 2026 · 1h 48m