Does Size Matter? Big Puck vs Little Puck in a Lyophilized Vial
Peptide Critic tested normal-looking and tiny residue-looking lyophilized pucks from the same Semax/Selank blend.
The Lab Report
Hands-on peptide lab reports — testing, COAs, vendor findings, and industry news.
Why Test Results Vary Between Labs: Multi-Lab COA Comparison
Multi-lab retatrutide testing from AFI, Janoshik, TrustPointe, Freedom, and Vanguard shows why peptide purity and mass results can vary between labs.
Peptide Degradation and Storage: Tirzepatide, MOTS-c, and Mazdutide Lab Results
Peptide Critic partnered with Analytical Formulations Inc. to test how Tirzepatide, MOTS-c, and Mazdutide held up under refrigerated and room-temperature storage over time.
Introducing Peptide Price & Stock Tracking
Track peptide availability and pricing across vendors in real time. Set restock alerts, watch price history, and stop checking five sites every morning.
GLP Peptides Pulled by Major Vendors as Compliance Pressure Accelerates
Major peptide vendors confirm GLP product removals due to evolving compliance standards. PeptideSciences and Modern Aminos signal a tightening market.
PeptideSciences Removes GLP-1 Peptides as Industry Crackdown Concerns Escalate
PeptideSciences has removed GLP-1 peptides as enforcement pressure grows. We examine industry signals, affiliate warnings, and SS-31 cease and desist actions.
HYB’s 10mg “Retatrutide” Disaster: When Your Telegram Plug Sells You a Mystery Peptide
“Retatrutide” batch tested at zero RETA, sending two users to the hospital. Peptide Critic breaks down the factory raid, AFI test results, community warnings, and the dangers of gray-market peptides.
MHRA bust - A warning to DIY researchers: don’t trust pens filled in a basement
MHRA’s record UK peptide bust proves one thing—researchers must vet sources, not trust basement-filled pens. Stay safe with verified gear.
Can Peptides Help Save the Planet? The Climate Impact of Appetite‑Suppressing Drugs
At first glance, GLP‑1 agonists like semaglutide (Wegovy) and tirzepatide (Zepbound) look like another weight‑loss fad. In clinical trials, these drugs slowed stomach emptying, increased feelings of fullness and cut energy intake by about 35 %
The Rise of Grey Market Peptides: Popularity, Transparency, and Safe Research Practices
Grey market peptides are growing in popularity, but safe research practices are essential. Learn about transparency, vendor testing, and lab protocols that protect research integrity.
The Importance of Third-Party Testing in the Peptide Industry
Learn why third-party peptide testing is essential for research reliability. Discover trusted labs like Janoshik, Freedom Labs, and Colmaric, and why vendor COAs alone aren’t enough.
Introducing the Finest 3D-Printed Vial Carrying Cases
our 3D-printed vial carrying cases represent more than just storage—they’re a symbol of our dedication to quality and innovation. When you choose Peptide Critic, you’re choosing craftsmanship that sets a new standard.