4.9 (312)
5mg / vial
RESEARCH PEPTIDES · USA
The cleanest peptides
your laboratory will run.
≥99.5% purity, verified by independent third-party HPLC and mass spectrometry on every batch. Synthesized in the United States. Shipped same day.
20% off your first order · code VESPER20
4.9 / 5 across 1,200+ verified ordersTrusted by 80+ research institutions
≥99.5% Purity
HPLC + mass spec on every batch
Third-Party Verified
Independent ISO-certified labs
Same-Day Shipping
Orders before 12pm PT ship same day
USA Synthesized
SPPS in our domestic facility
BESTSELLERS
Most ordered this month.
CJC-1295
GHRH Analogue
$38.00
4.7 (96)
2mg / vial
WHY VESPER
Held to a standard most suppliers
quietly skip.
Minimum purity
VESPER
≥99.5%, verified
Typical
97–98%, self-reported
Independent third-party COA
VESPER
Included with every batch
Typical
Available on request
Mass spectrometry confirmation
VESPER
Every batch
Typical
Sometimes
Synthesis facility
VESPER
United States, SPPS
Typical
Offshore, undisclosed
Order dispatch
VESPER
Same day before 12pm PT
Typical
3–5 business days
Quality guarantee
VESPER
Failed-COA replacement
Typical
Restocking fees apply
VERIFIED ON EVERY BATCH
The numbers are public. The proof ships with the box.
99.5%
MINIMUM HPLC PURITY
<24h
DOMESTIC ORDER DISPATCH
100%
INDEPENDENT LAB VERIFICATION
4.9 / 5 — 1,200+ verified reviews
What researchers are saying.
“The COA arrived before the package. HPLC matched the spec to the third decimal. That alone earned my next three orders.”
Dr. M. Hartwell
Independent research consultant
“We switched our entire vivarium pipeline to VESPER. Same-day dispatch, no batch failures in 18 months. The closest thing to a pharmaceutical supplier I have used at this price point.”
K. Reyes, Ph.D.
Translational neuroscience lab
“Most suppliers give you a number on a website. VESPER gives you a chromatogram, a mass spec trace, and a sealed nitrogen vial. The difference is obvious from the moment you open the box.”
S. Tanaka
Senior research associate
VOLUME PRICING
BUY 3+ VIALS · SAVE 10%
Order three or more vials in a single shipment and 10% comes off automatically at checkout. Combine compounds across the catalog — the discount applies to any three or more vials in a single shipment.
Free US shipping on orders over $200 Orders before 12pm PT ship same day COA included with every shipment
SAVINGS LADDER
- 1 VIALStandard pricing
- 2 VIALSFree domestic shipping
- 3+ VIALS10% off entire order
- 10+ VIALSContact for institutional rate
ORDERED BY RESEARCHERS AT
STANFORDJOHNS HOPKINSMITUCSFDUKECOLUMBIAMAYO CLINICYALE
Names listed for representational purposes only. VESPER is not affiliated with or endorsed by any institution.
FREQUENTLY ASKED
Answers before you order.
No. All VESPER products are research-grade chemicals supplied for in vitro laboratory research only. They are not approved for human or veterinary consumption, clinical application, or diagnostic use.
THE VESPER LIST · MEMBERS GET 15% OFF
Batch announcements.
New compounds. New COAs.
Join the list and receive a one-time 15% discount code for your first order. We send under one email per month — no marketing noise.
Already a researcher? Use code VESPER20 for 20% off your first order.