We threw away 710 vials. Here’s why.
Four batches went to an independent U.S. laboratory. One passed every check. Three failed sterility testing. None of them were ever sold.
One batch passed. Three didn’t.
In September 2026 we sent our first four batches to Vanguard Laboratory in Washington, USA. GLP-2 (TZ) 30 mg passed every check. GLP-3 (RT) 15 mg, GLP-3 (RT) 30 mg and GLP-2 (TZ) 15 mg failed sterility. We rejected all three and disposed of every vial.
Purity passed three. Our panel passed one.
Every result from the four reports, including the bad ones. A purity-only check would have approved two batches that failed sterility.
Passed Failed. All four reports were issued by Vanguard Laboratory on September 30, 2026, and are published on our Lab Results page. 150 + 140 + 420 = 710 rejected vials.
Check them at the lab itself. Each report is public on Verified by Vanguard, the lab’s own site: 001 · GLP-3 (RT) 15 mg ↗ 002 · GLP-3 (RT) 30 mg ↗ 003 · GLP-2 (TZ) 15 mg ↗ 004 · GLP-2 (TZ) 30 mg ↗
99.80% pure. Still failed.
One batch, one report
Both results come from the same GLP-3 (RT) 30 mg batch, on pages 1 and 2 of the same report.
Purity asks: is the peptide clean?
Over 99.80%. On purity alone, this batch looked perfect.
Sterility asks: is anything growing?
Yes. Growth was detected, so the batch was rejected.
The laboratory’s own photos of the three rejected vials, from page 1 of each report.
One failed check is enough.
Each batch ran eight checks. A batch is only approved when it passes all of them. Seven out of eight is a rejection.
Passed Failed: sterility on all three, plus purity and content on GLP-2 (TZ) 15 mg.
Sterility takes longer, costs more and can fail.
A purity test comes back in days. A USP <71> sterility test incubates the sample to see if anything grows. A failed result means throwing the batch away, so most sellers skip it.
Test, reject, dispose, publish, retest.
The same five steps for every batch that fails.
- 1U.S. lab
Tested four batches
Sent to Vanguard Laboratory, an independent lab in Washington, USA.
StopsSelling on the supplier’s word. - 23 batches
Rejected the failures
None were listed for sale.
StopsA failed batch reaching a customer. - 3710 vials
Disposed of every vial
All 710 vials from the three rejected lots.
StopsFailed stock coming back relabeled. - 4Lab Results
Published every report
All four reports, including the failures, under “Rejected lots”.
StopsBad results quietly disappearing. - 5Independent U.S. lab
Reordered and retesting
Each new batch is tested at an independent U.S. lab before it reaches you.
StopsAssuming the next batch is fine.
Three questions to ask any seller.
If the answer to any of these is no, you’re trusting the seller, not the lab.