Independent Purity Testing
Our compounds are tested by an outside accredited lab, not in-house. Results include identity, purity and the measured quantity per vial.
99.58%+Verified HPLC purity
Research-grade peptides
Elevate your Research with Nexus
Every compound we list is backed by independent HPLC testing from an ISO/IEC 17025 accredited laboratory, and we publish the certificates.
99.58%+purity
ISO/IEC 17025
accredited lab
The catalog
Research Compounds
Lyophilized research peptides, prices in USD. Compounds marked COA have a published third-party certificate.
For laboratory research use only. These products are not drugs, foods, cosmetics or dietary supplements and are not intended to diagnose, treat, cure or prevent any disease. Not for human or veterinary use.
Lab verified
Verified by an Independent Third-Party Laboratory.
We send our compounds to Vanguard Laboratory, an ISO/IEC 17025:2017 accredited lab (A2LA Certificate #6377.01.01), for identity, purity and quantity testing by HPLC-UV/VIS. We publish the full certificates so you can check the results yourself.
- Identity matched to reference standard
- Chromatographic purity by HPLC
- Measured quantity per vial
- Full certificates published
>99.80%GHK-Cu purity
99.58%R3 purity
17025ISO/IEC accredited lab
20Research compounds
Our standard
Why Researchers Choose Nexus
Transparent Certificates
We publish the full Certificate of Analysis, including the chromatogram. More certificates are added as new testing comes in.
Full COAPublished, not summarized
Direct Support
Questions about a compound, an order or a certificate go straight to the Nexus team. A real person reads and answers every email.
1:1Researcher support
Frequently asked
Common Questions
Can't find what you need? Email our team and we'll get back to you.
Contact supportAre your products independently tested?
Yes. Our compounds are tested by Vanguard Laboratory, an ISO/IEC 17025:2017 accredited laboratory, using HPLC-UV/VIS for identity, purity and quantity. The published certificates are in the Lab Testing section, and we add more as testing is completed.
Can I request a Certificate of Analysis?
Yes. Email [email protected] with the compound you're interested in and we'll send the latest available certificate.
Are these products for human use?
No. All Nexus Peptides products are sold strictly for in-vitro laboratory research. They are not for human or veterinary use, and we do not give usage or dosing guidance.
How should research peptides be stored?
Lyophilized (freeze-dried) peptides are usually stored cold, dry and away from light. Freezer storage at −20 °C is standard for long-term stability. Once reconstituted, solutions are typically refrigerated at 2–8 °C.
Where do you ship?
We ship within the United States. Orders are processed in 1–2 business days, and shipping is a $15 flat rate, free on orders of $100 or more. See our Shipping & Returns policy for details.
How do I place an order?
Add compounds to your cart and select "Send order request". Your order is sent to our team by email, and we reply to confirm availability, the total and how to pay.
Precision. Purity.
Elevate your Research with Nexus: third-party tested compounds and published certificates, with every batch held to the same standard.