Rena Malik, MD Podcast

Can Peptides Heal Your Joints, Gut, and Brain? Doctors Explain the Evidence

Feb 20, 2026
Guest
Jordan Feigenbaum, MD
Jordan Feigenbaum, physician, elite powerlifter, and founder of Barbell Medicine, breaks down peptide hype and real science. He discusses BPC-157 claims, growth‑hormone promotors, and next‑gen weight‑loss peptides. He also emphasizes resistance training for preventing sarcopenia and practical supplement and diet advice.
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INSIGHT

What Peptides Really Are

  • Peptides are short amino acid chains and chemically distinct from steroids, but marketing often blurs that line.
  • Many peptides require injection and are classified by length, which affects administration and regulation.
INSIGHT

Most Hyped Peptides Are 'Zombie' Drugs

  • Many popular peptides originated in pharma research but were abandoned for lack of efficacy, safety, or patentability.
  • Influencers resurrect these 'zombie' molecules despite limited clinical development or approval.
ADVICE

Don't Buy Research-Chemical Peptides

  • Avoid buying peptides from research-chemical sites because products are often mislabeled or contaminated.
  • If you use supplements, prefer third-party tested manufacturers and ask for heavy-metal and batch testing reports.
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