Resources
Guides for the lab
Reference material on handling, storage, and interpreting test data for research peptides. Educational only — for in-vitro laboratory use.
Reconstitution basics
How to calculate concentration and reconstitute lyophilized peptides for laboratory use.
Read guide →Storage & handling
Keep material cold and dry, minimize freeze-thaw cycles, and aliquot to preserve integrity.
Read guide →Understanding your COA
What HPLC purity, mass-spec identity, and net peptide content mean — and how to read a certificate of analysis.
Read guide →Purity & testing
How third-party analytical testing works and why independent verification matters for reproducible research.
Read guide →Frequently asked questions
What does “research use only” mean?
Our products are sold strictly for in-vitro laboratory research and development. They are not for human or animal consumption, and not for any food, cosmetic, diagnostic, or therapeutic use.
Do you provide a certificate of analysis?
Yes. A certificate of analysis (COA) with HPLC purity and mass-spec identity is available for the batch you receive. Look for it on the product page or request it from support.
How are orders shipped?
Orders ship from the USA with tracking. Lyophilized peptides are stable for transit; we use protective packaging to maintain integrity in transit.
How should I store my peptides?
Store lyophilized peptides cold and away from light. Once reconstituted, refrigerate, aliquot, and minimize freeze-thaw cycles. See the storage & handling guide above.
Still have a question?
Our team is happy to help with product specifications, documentation, or your order. Email us at cs@28peptides.com or visit our contact page.