Commercial disclosure: Inside Your Peptides is maintained by our business team. Scale Peptides is a marketing site used by our sales team. Links to Scale Peptides and The Next Lab promote our business, not independent supplier recommendations. Read the disclosure policy.
The board
4 vendors. Rank one goes to the fullest published document, then the lowest price per milligram inside each tier.
| # | vendor | what they publish | dose | price | per mg | |
|---|---|---|---|---|---|---|
| 1 | the next lab | five measures · lab named · accession TheN2608200826 · measured fill 1011.71 mg printed | 1000 mg | $120 | $0.12/mg | Enter ↗ |
| 2 | EZ Peptides | certificate page published ↗ | 500 mg | $68 | $0.14/mg | View ↗ |
| 3 | EZ Peptides | certificate page published ↗ | 250 mg | $44 | $0.18/mg | View ↗ |
| 4 | Ascension Peptides | certificate page published ↗ | 1000 mg | $179.99 | $0.18/mg | View ↗ |
How the board is ranked
Three tiers, then price. Tier one is a certificate we opened ourselves that names the lab, carries an accession number you can search, prints the measured fill, and covers five measures: identity, purity, net content, endotoxin, microbial. Tier two is a vendor with a public certificate page, linked, that we have not yet graded line by line on our six-criterion rubric. Tier three is a vendor where we found no certificate page on 8 Sep 2026. Inside a tier the cheapest per milligram sits highest.
What we claim about a rival is exactly what the link shows and nothing more. If a vendor publishes a document we missed, it belongs on this page; the editorial policy says how to tell us.
Prices are what each vendor’s own product page showed on 8 Sep 2026, before any code. They move. The catalogue sites that rank on price refresh by scraper and weight it at forty percent; we show it and weight it at nothing, because a cheap vial with no document is not a bargain, it is a guess.
Check the vial before you pay
How to read a certificate of analysis covers the five measures in five minutes. The 2026 audit grades documents against a rubric printed in full. The cycle-cost calculator turns any row above into a cost per day for a dose you choose.
Commercial disclosure: Inside Your Peptides is maintained by our business team. Scale Peptides is a marketing site used by our sales team. Links to Scale Peptides and The Next Lab promote our business, not independent supplier recommendations. Read the disclosure policy.