Peptides Exposed: Truth About Lab-Use Compounds | BPC-157 & More | Leigh Baxt, PhD

What if the peptide your favorite influencer is swearing by has never once been tested in a human clinical trial?

Michelle MacDonald sits down with drug development scientist Leigh Baxt, PhD  for a conversation that cuts straight through the wellness peptide industry.

Together they break down how drugs actually make it from an idea to FDA approval, why 99% of them never do, and what it means that the peptides flooding your social media feed are, in most cases, sitting at the very earliest stage of that process with almost no human data behind them. 

This episode digs deep into BPC-157 specifically, examining why the science raises serious red flags, and what informed consent actually sounds like when a clinician is promoting something with this little evidence. 

This information is essential listening for women who want to take charge of their health, cut through the marketing noise and make truly informed decisions.

Favorite Moments

• 1:57 The Staggering Failure Rates Behind Every Drug You've Ever Taken
• 3:07 From Idea to FDA Approval: What the Process Actually Looks Like
• 5:28 BPC-157: Why the Red Flags Are Hard to Ignore
• 12:49 Stacking Peptides & the Drug Interaction Problem Nobody Talks About
• 16:30 When Clinicians Become Marketers
• 22:21 How to Use ClinicalTrials.gov to Check the Evidence Yourself
• 28:22 The Patent Myth That Peptide Promoters Keep Repeating

"I want people to be informed. I want them to understand what data does and doesn't exist. Most importantly, I want them to be able to differentiate data from marketing — because even the most seasoned scientists can get sucked in." 

— Leigh Baxt, PhD

GUEST: LEIGH BAXT, PhD - DRUG DEVELOPMENT SCIENTIST

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Leigh works in early-stage preclinical drug development, the phase where 90% of ideas fail before they ever reach a human. Her work focuses on understanding whether promising biological mechanisms can actually be turned into safe, effective therapeutics. She volunteers her expertise with the Unbiased Science team to help the public understand how medicines are made, why the vetting process matters, and how to tell the difference between data and marketing.

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About Michelle:
Michelle MacDonald is the creator of the FITNESS MODEL BLUEPRINT™ and host of the Stronger By Design™ podcast. Known globally for her transformation programs, Michelle empowers women to redefine aging through evidence-based strength training, nutrition, and mindset practices. Since 2012, she has coached thousands of women online, leveraging her expertise as a Physique Champion and ISSA Strength and Conditioning Specialist. She co-founded Tulum Strength Club and established The Wonder Women (TWW), inspiring countless transformations including her mother, Joan MacDonald (Train With Joan™). Michelle continues to lead the charge in women's fitness, launching the Stronger by Design™ fitness app in fall 2024.

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Nothing in this video or podcast constitutes medical advice. Always consult a qualified healthcare professional before making changes to your health or fitness routine.