Every lab report Growth Guys publishes through Janoshik Analytical, counted on October 15, 2026: 244 reports across 133 products, mean purity 99.03% across the 181 that state one, lowest on record 93.844%. Each row links to the laboratory’s own verification page, not to a file on the vendor’s server.
Growth Guys publishes its third-party lab reports through Janoshik Analytical, an independent testing lab. Anyone can read them one at a time on the vendor's own site. Nobody, as far as we can find, has counted them — so we did. These are the aggregate figures across every report published as of October 15, 2026.
| Measure | Value |
|---|---|
| Reports published | 244 |
| Distinct products tested | 133 |
| Reports stating a purity figure | 181 |
| Average purity across those | 99.03% |
| Range | 93.844% to 99.99% |
| At or above 98% purity | 148 of 181 |
| Below 98% purity | 33 of 181 |
| Test dates span | 2024-09-30 to 2024-09-30 |
| Most recent report added | 2024-10-09 |
Because leaving them out would make the other 148 worthless. A vendor page showing nothing but perfect scores tells you only which results were selected for display. The useful number is the whole distribution: 99.03% average with a floor of 93.844% across 181 reports is a stronger statement than any single certificate, precisely because it includes the weaker ones. Every figure in the table above is recomputed from the vendor's published set each time this page rebuilds.
Each row below links to the report on janoshik.com — the testing lab's own domain, not a PDF hosted by the vendor and not a screenshot. That distinction is the entire point: a certificate served from the seller's own server can be anything, while a record on the lab's site was written by the lab. Match the batch code on the report to the batch code on the vial you were actually sent; a report for a different batch tells you nothing about yours.
| Added | Product | Batch | Purity | Mass | Source |
|---|---|---|---|---|---|
| 2024-10-09 | Retatrutide | RET01 | 96.27% | 10.94 mg | Janoshik report |
The vendor's full lab-results index →
Stated plainly so anyone can reproduce it or find fault with it.
All 244 rows, including every report below 98%. Free to reuse with attribution.
Lab-report figures, sources and today’s coupon details are on the front page · every report, counted.
244 Janoshik reports covering 133 distinct products, with test dates spanning 2024-09-30 to 2024-09-30. The most recent was added 2024-10-09.
99.03% across the 181 published reports that state a purity figure, ranging from 93.844% to 99.99%. 33 came in below 98%.
Yes. Each report links to janoshik.com, the testing lab's own domain, rather than to a PDF hosted by the vendor. Match the batch code on the report to the batch code on your vial.
We are an affiliate: if you order from Growth Guys using this code we earn a commission, at no extra cost to you. We are not Growth Guys and have no ownership of or role in the company.