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The Peptide Bond Blog

In-depth articles on peptide biochemistry, drug mechanisms, evidence reviews, and study guides. Written for clarity without sacrificing scientific accuracy.

6 articles
Evidence-based
MCAT & NEET relevant
● Breaking · April 2026 11 min read
FDA Schedules July 23–24 PCAC Meeting on 7 Peptides
The FDA has opened public comment on BPC-157, TB-500, and five other peptides for Section 503A bulk drug substances. Analysis of what compounding pharmacies, clinicians, and patients need to know before the July comment deadline.
Read analysis →
Regulatory Update 9 min
FDA Peptide Reclassification: What RFK Jr.'s Push Actually Changed
April 15 Category 2 removals, the two regulatory gates, and why PCAC review in July is the real milestone.
Monthly Briefing · Issue #1 8 min
Peptide Intelligence Briefing — March 2026
14 peptides returning to legal compounding. Peptide Sciences shuts down. GMP sourcing intel for providers.
Biochemistry 8 min
What Is a Peptide Bond?
The bond that holds every protein together. Formation, planarity, resonance, and hydrolysis explained.
Drug Comparison 10 min
Semaglutide vs Tirzepatide
Ozempic or Mounjaro? Mechanisms, weight loss data, side effects, and engineering differences compared.
Evidence Review 12 min
BPC-157: What the Science Says
544+ studies. One research group. Three human trials. The honest assessment of BPC-157.
MCAT & NEET 15 min
The 20 Amino Acids: Study Guide
The #1 exam topic. Classifications, pKa values, mnemonics, charge calculations.
Drug Mechanism 10 min
How GLP-1 Drugs Work
The biochemistry behind Ozempic, Mounjaro, and the entire GLP-1 drug class.