Thematic hub
Peptide Quality & Verification
How research peptide material is tested, what a certificate of analysis actually records, and how a buyer checks that a vial matches its paperwork. Every article in this hub is about verification, not about use.
Questions answered here
11- How to read a certificate of analysis (COA)What a certificate of analysis shows: which COA fields matter, what purity and identity numbers prove, and where that paperwork stops being proof.Updated 2026-10-01
- How to check a peptide certificate of analysis is genuineA field-by-field checklist for a peptide certificate of analysis: match the batch, confirm the laboratory, read the test scope, and see what each check can and cannot show.Updated 2026-10-03
- What research grade actually meansResearch grade is a catalogue phrase, not a published standard. What named grades like ACS and USP are, and what For Research Use Only does not mean.Updated 2026-09-07
- What a batch or lot number lets a researcher verifyA batch or lot number identifies one production run. What that code lets a researcher check, what it ties together, and where its verifying power stops.Updated 2026-10-01
- CJC-1295 with DAC vs without DAC: what is the difference?CJC-1295 with DAC and without DAC are two different peptides. Side-by-side sequence, half-life literature and registry numbers, and what modified GRF(1-29) means.Updated 2026-10-03
- Selank vs Semax: are they the same peptide?Selank and Semax are two different seven-amino-acid peptides that share a Pro-Gly-Pro ending. A position-by-position sequence table, their origins, and the limits of comparing studies.Updated 2026-10-03
- Is NAD+ a peptide?NAD+ is a coenzyme made of two nucleotides, not a peptide. What the PubChem, ChEBI and wwPDB records show about its structure.Updated 2026-10-04
- How mass spectrometry confirms peptide identityHow mass spectrometry confirms peptide identity: what a matching mass shows, how fragmentation reads the sequence, and why identical masses call for a second test.Updated 2026-10-04
- How HPLC purity is measured for peptidesHow HPLC purity is measured for peptides: what a 99% figure means, how peak area becomes a percentage, and what the number cannot show about identity or content.Updated 2026-10-04
- Endotoxin, sterility and purity: three different testsWhat an endotoxin test, a sterility test and a purity test each measure, and which of the three the 14 lab reports on file at Form Laboratories document.Updated 2026-10-04
- TB-500 vs thymosin beta-4: is TB-500 the same molecule?TB-500 and thymosin beta-4 are not the same molecule in the papers that define them: a full-length protein against a short acetylated fragment, compared side by side.Updated 2026-10-04
Form Laboratories supplies research-use-only reference material. Everything in this hub is an educational summary of published third-party literature. It is not medical advice, not a use instruction, and research material is not for human or animal use.