The PepStack Pro Blog
Physician-written articles on peptides, protocols, FDA updates, and longevity medicine. No hype — just science and clinical experience.
How to Switch from Semaglutide to Tirzepatide: A Physician's Practical Guide
Thinking about switching from semaglutide to tirzepatide? This physician-written guide explains when the change makes sense, how transitions are usually handled, why overlap is risky, and when supervision matters.
Semaglutide vs. Tirzepatide: Which GLP-1 Is Better for Weight Loss?
Trying to decide between semaglutide and tirzepatide, or Wegovy vs. Zepbound? This physician-written guide breaks down weight-loss results, side effects, access, and how to choose the right GLP-1 for your goals.
Peptide Protocol Builder: A Physician's Guide to Designing Safer, Goal-Based Plans
Most so-called peptide protocol builders are really just internet dosage charts. This physician-written guide explains how real peptide protocols are designed around goals, baseline data, monitoring, and medical supervision.
The Physician's Guide to GLP-1 Medications: Semaglutide vs. Tirzepatide vs. Retatrutide
GLP-1 medications are the biggest breakthrough in metabolic medicine since statins. A physician's no-nonsense guide to how they work, how they compare, side effects to expect, and why supervision matters more than which one you choose.
The Complete Beginner's Guide to Peptide Stacking: Rules, Proven Combos, and What to Avoid
Peptide stacking is one of the most powerful tools in longevity medicine — and one of the most misunderstood. A physician's no-nonsense guide to the 4 rules of smart stacking, 5 proven combinations by goal, and the mistakes that waste your money.
Gray Market vs. Physician-Supervised Peptides: What You Need to Know
The peptide market is booming — and so are unregulated sources. A physician's honest breakdown of the real risks of gray-market peptides, what supervised therapy actually looks like, and why the cost comparison isn't what you think.
FDA Peptide Reclassification 2026: 14 Peptides Restored — What It Means for You
On February 27, 2026, HHS announced that 14 previously restricted Category 2 peptides are moving back to Category 1. Here's what changed, which peptides are affected, and what this means for your protocols.
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