The PUŪRA Journal · 14 articles
Peptide research education, in plain English.
What each compound is, what has been studied, and where the evidence is still developing. Every article ends with what the research actually supports.
Quality & Handling · 4 articles
Quality & Handling · 6 min
What "Third-Party Tested" Actually Means for Peptides
Third-party tested should mean an independent laboratory measured the lot being sold. This guide covers what the phrase requires, the five common ways it gets stretched, and how to check the claim from a certificate in a few minutes.
September 26, 2026Quality & Handling · 5 min
How to Choose a Research Peptide Supplier in 2026: A 10-Point Checklist
Ten things to verify before buying research peptides in the USA: lot-specific certificates, a named laboratory, identity by mass spec, net peptide content, and the red flags most buyers miss.
September 17, 2026Quality & Handling · 4 min
How to Store Lyophilized Peptides: Stability, Shelf Life, and the Cold-Chain Myth
Storage conditions for lyophilized research peptides: temperature, light, moisture, why the vial should warm before opening, which sequences degrade first, and why cold-chain shipping is packaging rather than chemistry.
September 17, 2026Quality & Handling · 5 min
How to Read a Peptide Certificate of Analysis, Line by Line
A line-by-line guide to a research peptide certificate of analysis: what LC-MS, RP-HPLC, net peptide content, LAL endotoxin and heavy-metals results actually show, and the red flags that mean the certificate is not worth the PDF it came in.
September 17, 2026
Free kit · 3 guides · 23 pages
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