About
Peptide Codebook is an independent index of US research peptide suppliers, what their documentation shows, and the discount codes that actually work.
Who runs it
Steven Gawinski. I hold ambassador accounts with NovaPrime Labs, which is where STEVEN15 comes from, and with Unmatched Supps, which is where STEVEN10 comes from. I also publish unmatchedpromocodes.com, which covers the full Unmatched catalog rather than just the peptide products.
How this site makes money
When you use STEVEN15 or STEVEN10, I earn a commission from that vendor. You pay less than you otherwise would, so the arrangement costs you nothing and saves you something. That is the entire business model and there is nothing else going on here.
The obvious conflict is worth stating plainly: I am paid when you buy from one specific vendor, so I have a reason to present that vendor favorably. The only real defense against that is publishing things you can check. Everything on this site about any vendor's testing, manufacturing, shipping or returns comes from their own published material and can be verified in a few minutes. Where I could not verify something, I say so. Where a competitor is better on a dimension, I say that too.
Why only two codes are listed
Because they are the only two I have tested myself. Publishing codes I have not verified would make every other code here suspect the first time one failed at checkout, and the whole value of this site is that the codes work. If I obtain and verify codes for other vendors, they will appear in the index.
On covering two different categories
Research peptides and dietary peptide supplements are not the same thing, and this site does not treat them as though they are. They appear together because people search for both under the same word, not because anything carries over between them. The comparison page exists specifically to keep that line visible rather than letting it blur, which is the failure mode of most sites covering this space.
What this site will not publish
No claims about what any research compound does. No dosing information. No testimonials about results. Research peptide vendors sell material for qualified laboratory research use only, not for human consumption, and nothing here should be read as suggesting otherwise. Where dietary supplements are covered, ingredient names and doses come from the manufacturer's own label and benefit claims are theirs rather than mine. I also do not repeat vendor claims I cannot check, including NovaPrime's own statement that they are the only supplier using three certified laboratories.
Keeping it current
Codes and terms are re-checked against live checkouts and the date is published on each page. If something here does not match what you see on a vendor's site, this site is wrong. Terms in this category change without notice.
15% off any order at novaprimelabs.com. Stacks on top of sitewide sales. No minimum order.
Affiliate disclosure: we earn a commission when you use this code. It costs you nothing extra and does not change your price.
Last verified October 26, 2026 by Steven Gawinski.