Lab Testing and Certificates of Analysis

Every research peptide Regenwell PH sells is a white lyophilised powder in a sealed vial. From the outside, a 99.9% pure vial and a mislabeled one look identical. The only way to know what is in a vial is an independent laboratory test, and the only way for you to trust that test is to be able to check it yourself. This page explains how our testing works, what we publish, how to read a certificate, and what to do if the certificate you want is not yet listed.

What we publish

Certificates of analysis are listed on the Certificate of Analysis page, one row per compound and vial size, and are repeated on each product page under "Purity and testing". Each is the laboratory's own PDF, uploaded unedited, with the sample code or task number printed so you can confirm it on the lab's verification page (Accumark Labs or Janoshik Analytical). As of October 2026 we publish ten certificates covering tirzepatide, retatrutide, GHK-Cu, BPC-157, tesamorelin and the KLOW blend. These were commissioned by the manufacturers of the lots we stock; Regenwell-commissioned testing of our own stock is in progress and will be added as results return. If the compound you are ordering is not yet listed, message us with the product name before you order and we will send the current batch result or tell you plainly that it is pending.

How the testing works

  1. Sampling. A vial from the manufacturing lot is sent to an independent laboratory. The lot code is printed on the certificate and on the vial label, so the two can be matched.
  2. Purity. High-performance liquid chromatography (HPLC) separates the sample and reports what percentage of it is the target peptide. A purity figure of 99% or higher is the standard we expect for research-grade material.
  3. Identity and quantity. The certificate confirms the sample is the declared compound and reports the measured milligrams in the vial against the label claim. Purity without identity only tells you the sample is "mostly one thing"; identity tells you which thing; quantity tells you how much.
  4. Publication. We upload the lab's PDF without edits and print its verification code. We do not retype, crop or summarise the numbers in place of the document.

How to read a certificate

  • Compound name should match the product you are buying, not a related compound.
  • Purity is a percentage. Look for the method (HPLC) and the figure.
  • Identity or mass confirms the molecular identity against the declared compound.
  • Quantity, where reported, shows the measured milligrams in the vial against the label claim.
  • Client name. The client on a certificate is whoever commissioned the test. On the certificates we currently publish that is the manufacturer, not Regenwell PH; we say so on every page where they appear.
  • Verification code. If the code on the PDF is not recognised on the lab's own verification page, treat the certificate as unverified and tell us.

What a certificate does not tell you

A certificate describes the sampled vial from that lot at the time of testing. It does not describe how the supplier stored the batch afterwards, how it was shipped, or how you store it after delivery. That is why our product pages give storage guidance and why vials are packed against breakage and shipped by tracked courier. Handling after the certificate is your responsibility and ours together.

Why this matters in the Philippines specifically

Demand for tirzepatide, retatrutide and cagrilintide has drawn sellers into the market who publish no testing at all, or who reuse a single certificate image across every product. Our guide to spotting fake or mislabeled peptides and the six-point sourcing checklist show how to check any supplier, including us.

Request a certificate

Message us through the contact page with the product name, or with your order number after purchase, and we will send the batch certificate. Questions about reading a certificate are welcome in the WhatsApp research community.

All products are intended strictly for laboratory and research use only and are not for human or animal use. Certificates of analysis describe the tested sample and are not a claim of suitability for any purpose other than research.