Every lot tested. Every certificate published.
Leng Labs provides high-quality research peptides and laboratory supplies to support innovation in research and development, with every lot independently assayed and every certificate published before it ships.
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High-purity peptides, lyophilized for laboratory research. Sample listings for the demo.
TB-500
GHK-Cu
Ipamorelin
CJC-1295 (no DAC)
Tesamorelin
Epitalon
MOTS-c
About Us
Leng Labs is a research-focused supplier of high-purity peptides and laboratory materials. We make quality verifiable: every lot is assayed for purity and identity by an independent lab, and the signed certificate for your exact lot is public before you order.
Independent testing
Each lot is assayed for purity and identity by an outside lab before it is listed.
Published certificates
The signed certificate for your exact lot is public, and it's saved to your account after you order.
Tracked shipping
Orders ship in tamper-evident packaging with tracking to your door. US only.
Contact Us
For quotes, wholesale orders, and certificate requests.
+1 (555) 000-0000
Placeholder contact details for the demo.
COA's
Enter a lot number or compound name to see the certificate for that lot.
Questions
Are your products tested?
Yes. Every lot is tested by an independent lab for purity and identity before it is listed, and the certificate is published for that lot.
How do I find a certificate of analysis?
Use the lookup above and enter your lot number or the compound name. Certificates for your orders are also saved in your account.
How should I store the compounds?
Products ship as sealed, lyophilized powder. Follow the storage guidance on each product page and certificate.
Can these products be used in people or animals?
No. All products are sold strictly for in-vitro laboratory research. They are not drugs, foods, cosmetics, or supplements, and are not for human or veterinary use.
Where do you ship?
We ship within the United States only.