Deep Dives into Peptide Science
Research breakdowns, protocol design, and the latest findings from the world of peptide science. Written for researchers who care about the evidence.
GLP-1 Agonists Cut Atrial Fibrillation Risk Independent of Weight Loss
A 12,000-patient study presented at Heart Rhythm 2026 found GLP-1 receptor agonists reduce atrial fibrillation risk by 33%, even in patients who gained weight. Semaglutide showed the strongest effect.
What’s Actually in Your Peptide Vial? The Testing Data Is Alarming
Independent labs are testing 7,000 peptide samples a month. One-third fail basic quality checks. A Belgian study found arsenic in every sample tested. Here’s what the data shows.
Beyond Weight Loss: How Retatrutide Rewires Fat Metabolism at the Cellular Level
New metabolomics data from Eli Lilly reveals retatrutide doesn't just shrink fat. It transforms dysfunctional fat tissue into a metabolically healthy organ through enhanced fatty acid oxidation and insulin resistance reversal.
Retatrutide: The Triple Agonist That Makes Semaglutide Look Like a Warm-Up
Eli Lilly's retatrutide just delivered 24.2% body weight loss in 48 weeks — matching bariatric surgery. Three new May 2026 studies explain why hitting three hormone receptors simultaneously changes everything.
FDA PCAC July 2026: The 7 Peptides That Could Return to Legal Compounding
The FDA scheduled a July advisory committee meeting to review BPC-157, TB-500, and five other peptides for potential return to legal compounding. Here's what the meeting actually means—and what it doesn't.
GHK-Cu: The Copper Peptide That Modulates 25% of Your Genome
GHK-Cu isn't just a skincare ingredient. Genomic analysis shows it modulates over 4,000 human genes — and the research is exploding.
MOTS-c: The Mitochondrial Peptide WADA Banned Before the FDA Even Noticed
A 16-amino acid peptide encoded by your mitochondrial DNA that mimics exercise, fights obesity in mice, and was banned by WADA in 2024 — before a single human trial.
Peptides in Orthopaedics: What the 2026 AAOS Review Reveals
The American Academy of Orthopaedic Surgeons just published a comprehensive review on BPC-157, TB-500, and GHK-Cu. Here's what the evidence actually shows about peptides for injury recovery.
BLMP6: The Peptide That Hunts Down Metastatic Breast Cancer Cells
UTHealth Houston researchers engineered a peptide that targets fibulin-4 on metastatic breast cancer cells, dramatically suppressing tumors in mice. Here's how it works and why it matters.
CJC-1295/Ipamorelin and Sleep Problems: Why It Happens and How to Fix It
Started CJC-1295/Ipamorelin and now you can't sleep? You're not alone. Here's why GH secretagogues disrupt sleep and what actually works to fix it.
FDA Removes 12 Peptides from Restricted List — Compounding Access Could Return by July 2026
The FDA has removed 12 peptides from its restricted Category 2 list and scheduled PCAC meetings for July 2026. BPC-157, TB-500, KPV, and 9 others could become legally available for compounding again.