Vendor Documentation Index C–P: Suppliers We Have Checked

If you’ve spent an evening trying to work out whether a peptide supplier is what it says it is, you already know the problem. Every site in this category runs the same four lines: made in the USA, third-party tested, over 99% pure, research use only. The copy is close to identical from one storefront to the next, which means reading the copy tells you almost nothing.

So we stopped reading the copy and started reading the documentation. Every vendor below has been checked against the same five questions, on the same day, using only what the vendor publishes on its own pages. Does the site say it synthesizes the material or that it sources it? Is the testing laboratory named, or is it just “an independent third party”? Does the panel cover more than purity? Can you open a batch certificate before you pay? And if the vendor sells blends, does it publish the milligrams of each component?

We publish our own lots against that same standard, which is the only reason we think we’re entitled to ask it of anyone else. Where a vendor documents something better than we do, the post says so. Nothing here is a claim that a company’s documentation doesn’t exist, only a record of what was and wasn’t publicly listed on the pages we reviewed.

The standard everything below is measured against

Five questions, applied the same way every time. Does the supplier state that it synthesizes the material, or that it sources it? Is the testing laboratory named? Does the panel cover identity, purity, bacterial endotoxin and sterility, or purity alone? Is a batch certificate readable before you pay, tied to the lot number on the vial? And for blends, are the milligrams disclosed per component?

Blank Peptides publishes its own lots against that standard: an own cGMP laboratory that compounds, fills, finishes and labels each lot; Freedom Diagnostics and Horizon Analytical named as the testing laboratories; a full panel per lot covering identity, >99% purity, bacterial endotoxin and sterility; and a batch certificate of analysis for every lot, with the lot number printed on the vial.

The index

Cosmic Peptides

Direct Peptides

Infusion Peptides

Ion Peptides

Limitless Life Nootropics

Lone Star Peptide Co

Modern Aminos

Neurolabs

NextGen Peptides

Nootropic Source

Northline Labs

Oath Peptides

Oath Research

Paradigm Peptides

Paramount Peptides

Peptide Sciences

Peptide Vault

The rest of this index

The hubs behind this index

The other indexes

For research use only. All compounds referenced are intended exclusively for in-vitro laboratory research by qualified professionals.

Written by Blank Peptides Research Team

Peptide science researchers with 5+ years in US-based peptide manufacturing, independent HPLC and mass spectrometry testing, and research education. All content is reviewed for scientific accuracy before publication.

REVIEWED BY

Dr. Tobias S — PhD Chemist, Peptide and Unnatural Amino Acid Synthesis

Dr. Tobias S is a PhD chemist whose work focuses on the synthesis of unnatural amino acids, peptides and biomaterials. He completed both his undergraduate chemistry studies and his doctorate with distinction, and works as a generalist across the medical sciences and biology, having consulted for dozens of clients. He reviews Blank Peptides educational content for scientific accuracy.

Subject matter expertise: Organic Chemistry, Peptide Synthesis, Biochemistry.