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20% OFF YOUR FIRST ORDER Join COA updates and restock alerts on progressivebioscience.com and your 20% off first-order code is emailed to you as soon as you sign up.
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Every supplier says tested. Few let you check.

Progressive Bioscience publishes its certificates of analysis online, lot by lot, with the lab, the date and the report number. You can look any of them up on the lab's own website before you spend a dollar.

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  • COAs published online
  • Independent labs, named
  • Free U.S. shipping over $125
Certificate of analysis published by Progressive Bioscience Read the certificates → Progressive Bioscience vial
20% Off First OrderCOAs Published OnlineIndependent LabsPurity ≥98% RP-HPLCLC-MS IdentityCold Pack Included

Three things a certificate can hide

Know them before you order. Then shop with 20% off.

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Lot traceability

The certificate was real. Was it for your vial?

One good report can sit on a product page for a dozen batches. The lot number and a report you can look up are how you tell.

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Net content

99% pure says nothing about how many milligrams you got

Purity is a ratio. Content is an amount. Most certificates only report the first one.

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Identity

A 99% pure sample can still be the wrong compound

Purity tells you how clean. It cannot tell you what. That takes a second test.

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First order offer 20% off your first order. Join COA updates and restock alerts on progressivebioscience.com and your 20% off first-order code is emailed to you as soon as you sign up. Free U.S. shipping on orders of $125 or more, cold pack included. Get 20% Off → Certificates of analysis published online, with lot, lab and test date.

What Progressive Bioscience asks every certificate to show

01Purity98% or higher by reverse-phase HPLC 02ChromatogramThe trace behind the percentage 03IdentityObserved mass matched to expected, by LC-MS 04Net contentMeasured mg per vial against the label 05Lot or batchThe exact material that was tested 06Named labIndependent third-party labs preferred 07Test dateWhen the analysis was run 08Endotoxin and sterilityResults where available

Supplier certificate requirements as published on progressivebioscience.com/how-we-test.

Check the paperwork. Then save 20%.

Join COA updates and restock alerts on progressivebioscience.com and your 20% off first-order code is emailed to you as soon as you sign up. Free U.S. shipping on orders of $125 or more.

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Advertising disclosure. This page is paid promotional content for Progressive Bioscience. Links on this page go to progressivebioscience.com. Read the full advertising disclosure.
Progressive Bioscience Certificates of Analysis Advertising Disclosure Privacy Terms

For in-vitro laboratory and analytical research only. Not for human or animal consumption. These research materials have not been approved for therapeutic, diagnostic, or clinical administration. Research materials are not FDA-approved for human or veterinary use. Research-use-only labeling does not constitute FDA approval or authorization.

Access to progressivebioscience.com is restricted to individuals 21 years of age or older.

This website is paid promotional content for Progressive Bioscience. © 2026 Progressive Bioscience.

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