Every product page on SteroidesLab includes a Certificate of Analysis with an HPLC purity percentage. But what does that actually mean? This article explains HPLC testing in plain English — what it measures, what the numbers mean, and why it is the gold standard for product verification.
What Is HPLC?
HPLC stands for High Performance Liquid Chromatography. It is the same analytical method used by pharmaceutical companies, FDA laboratories, and university research labs to measure the purity of chemical compounds.
In simple terms: a sample of the product is dissolved in a solvent and pushed through a column under high pressure. Different molecules travel through the column at different speeds. A detector at the end measures exactly how much of each molecule is present. The result is a chromatogram — a graph showing peaks that represent each compound.
What the Numbers Mean
- 98.5% purity: The primary active compound makes up 98.5% of the sample. The remaining 1.5% consists of manufacturing byproducts, residual solvents, or related substances — all within safe pharmaceutical limits.
- Below 98%: Indicates significant impurities. We reject any batch that falls below our 98% minimum standard.
- 99%+: Exceptional purity. Most pharmaceutical-grade products fall in this range.
Why Independent Testing Matters
Many suppliers in this space claim their products are “99% pure” with zero evidence. Without an independent HPLC report, those numbers are meaningless. Independent testing means the analysis is performed by a third-party ISO 17025 accredited laboratory — not by the manufacturer themselves.
At SteroidesLab, every batch undergoes third-party HPLC-UV analysis before it reaches our warehouse. We publish the results whether they pass or fail. This is the only way to guarantee that what is on the label is what is in the vial.
How to Verify Our Reports
Each product page has a “Lab Report” tab containing the Certificate of Analysis. The report includes the batch number, assay date, HPLC method, purity percentage, and pass/fail verdict for each quality parameter. You can cross-reference the batch number with the lot number printed on your product.
If you ever want to independently verify a product you received, we encourage it. Send a sample to any ISO-accredited lab. If the results do not match our published Certificate of Analysis, we will refund your entire order — including the lab testing fee.
