The PUŪRA Journal · 32 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 · 10 articles
Quality & Handling · 3 min
How Are Peptides Made? One Bead, One Link at a Time
How are peptides made? Usually not grown in cells. They're built one amino acid at a time on a tiny bead, and the small misses are why purity testing exists.
November 7, 2026Quality & Handling · 3 min
Does GHK-Cu Need to Be Refrigerated? How to Store a Sealed Vial
Does GHK-Cu need to be refrigerated? A sealed, freeze-dried vial lives in the fridge, dark and dry, with the freezer for long-term. Here's why.
October 31, 2026Quality & Handling · 3 min
Are Peptides Steroids? The Difference Comes Down to Shape
Are peptides steroids? No. One is a chain of amino acids, the other is four fused carbon rings. Here's the difference, and why it matters for a vial.
October 23, 2026Quality & Handling · 3 min
Made in USA vs. Imported Peptides: Where Each Step Happens
Made in USA vs imported peptides is really two questions: where the raw peptide is made, and where the vial is finished. Here's how to tell.
October 2, 2026Quality & Handling · 3 min
How to Handle Your Vials (and Why You Never Shake Them)
How to handle peptide vials without the panic. A box on the porch is rarely the problem. Shaking a mixed vial is. Here's what the studies found.
October 1, 2026Quality & Handling · 3 min
Peptide Half-Life Explained: Why Some Last Minutes and Others Last Days
Some peptides clear the blood in two minutes. Others last a week. Peptide half-life explained, and the 1978 study that shows why longer isn't better.
September 30, 2026Quality & Handling · 3 min
What "Third-Party Tested" Actually Means for Peptides
What does third-party tested mean for peptides? A named lab tested one batch on one date. Here's the 30-second check that shows if it still counts.
September 26, 2026Quality & Handling · 3 min
How to Read a Peptide Certificate of Analysis: Purity vs. Net Content
How to read a peptide COA: 99% pure doesn't mean your vial is 99% peptide. One line tells you how much peptide is really in the powder.
September 17, 2026Quality & Handling · 3 min
How to Store Lyophilized Peptides: Stability, Shelf Life, and the Cold-Chain Myth
How to store lyophilized peptides, simply: what really breaks the powder down, fridge vs freezer, and the one moment cold can hurt.
September 17, 2026Quality & Handling · 3 min
How to Choose a Research Peptide Supplier: Check Identity First
How to choose a research peptide supplier: a 99% pure peptide can still be the wrong peptide. Here's the line on the certificate that proves what it is.
September 17, 2026Peptide of the Week
One peptide a week, explained by Dr. Jade Teta, ND
Every Thursday, Dr. Teta, a member of our Scientific Advisory Board, writes a one-page monograph on one research compound: where it came from, what researchers are studying, and how strong the evidence is. It’s free.
By Dr. Jade Teta, ND
PUŪRA Scientific Advisory Board
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