Weight loss / metabolic (dual GIP/GLP-1)

Tirzepatide

Mounjaro, Zepbound

FDA-approved, strong human data
Based on expert consensus from publicly available videos plus public FDA/regulatory status — not medical advice. Peptides are prescription territory; consult a physician before using anything here.

The Verdict

A dual agonist (GIP + GLP-1) that outperforms semaglutide on weight loss in trials (Attia). Same muscle-preservation rules apply — the faster the loss, the harder you defend lean mass.

The Evidence

FDA / Legal Status

FDA-approved (type 2 diabetes and obesity)

Human Evidence

Large randomized trials — more potent than semaglutide (dual GIP/GLP-1 agonist)

Sport / Doping

Prescription drug

Safety Flags

  • Lean-muscle loss with rapid weight loss; protein + resistance training essential
  • GI side effects during dose escalation

Who Covers It

Peter Attia
Peter Attia
Andrew Huberman
Andrew Huberman

Other experts in the panel had no substantive coverage of this peptide — we don't guess their position.

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