Research-grade peptides. Verified purity.
US-based supplier of independently tested Tirzepatide, Semaglutide, Retatrutide, and specialty research peptides. Every batch ships with a published Certificate of Analysis. For laboratory research use only.
• Not for human consumption
Research Catalog
Three extensively studied incretin peptides. All third-party tested and supplied with COAs. One-time orders ship Standard 2-Day or expedited; standard shipping is free on the Semaglutide 28-day subscription. For laboratory research use only.
How It Works
From account to delivery in four simple steps. Transparent testing, straightforward ordering.
Create Account (2 min)
Register a free account and accept the Research Use Acknowledgment.
Select Your Compounds
Choose the peptides and supply cadence that fit your research needs. Free standard shipping on all recurring plans.
Receive Your Order
Your peptides arrive discreetly in sealed lyophilized vials with storage and handling guidance.
Verify Your Batch
Review the published Certificate of Analysis for your lot and manage reorders from your dashboard.
Customer Reviews
Hear from the researchers and account holders who rely on Progressing for tested, documented peptides
Customer Satisfaction
Verified Purity
Happy Customers
"Every vial came with a matching COA and the batch numbers lined up. Shipping was fast and the support team answered every question I had about storage."
Keisha M.
Atlanta, GA
Your Confidence Is Our Priority
We stand behind the quality of our peptides and the transparency of our service.
Quality Guaranteed
Every batch is third-party tested for purity and potency. If it does not meet our standards, it does not ship.
Flexible Subscriptions
Pause, skip, or cancel your subscription at any time from your dashboard. No lock-in contracts, ever.
Dedicated Support
Our team is available via email and chat to answer questions about COAs, shipping, or your account.
Quality You Can Verify
Research-grade peptides, independently tested and transparently documented. Supplied for laboratory research use only.
Extensively Studied Compounds
GLP-1, GIP, and glucagon receptor agonists with a deep body of published research. We supply the same molecules characterized in peer-reviewed literature.
Ships in Days, Not Weeks
Orders ship discreetly from the US within 1–3 business days with tracking. Recurring plans ship automatically on your schedule.
Lyophilized for Stability
Supplied as freeze-dried powder in sealed vials for maximum shelf life and consistency. Storage guidance included with every product.
Every Batch Tested
Independent third-party lab testing on every production batch. Purity and potency verified before it ships.
Published COAs
Certificates of Analysis for every batch are published on our public testing tracker so you can verify identity and purity before you order.
Research Use Only
All products are supplied strictly for in-vitro laboratory research. Every account holder accepts our Research Use Acknowledgment before ordering.
Free Health Calculators
General wellness and reference tools. Provided for educational purposes only — not medical advice.
Learn the Science
28+ research-backed guides covering everything from GLP-1 science to mental wellness
Ready to Source Research-Grade Peptides?
Join 500+ researchers who rely on Progressing for independently tested peptides with published COAs. For laboratory research use only.