Quality & Testing

Every new batch takes 15 tests, on 23 units, at outside labs. If it fails one, we do not sell it. Every report is published the way the lab sent it. The full story, with pictures, is on Testing & QA, Analytical Labs and Manufacturing.

How our testing has changed

February 2025. We started putting a lab report on every batch. One outside lab, seven rows: is it the right compound, is it clean, how much is inside, does that match the label, any germ dust, one germ test, and the lab's sign-off.

April 2025. Heavy metals added. Eight rows.

October 2025. Germs checked two ways, at two labs. Vanguard grows a sample for 14 days; Eagle Analytical counts living cells the same day. A batch has to pass both. Nine rows.

February 2026. The full panel. Four tests added: leftover cutting acid, leftover cleaning liquid, is the vial sealed tight, does it dissolve. Three vials measured for how much is inside, instead of one. Fourteen rows. Every new batch since June 2026.

August 2026. The adulterant screen: anything in the vial that should not be there. Fifteen rows on every new batch, on 23 units. Every new lab has to pass our onboarding checks first; Ethos Analytics joined in September.

Which standard is my batch?

Every certificate on this site shows how many tests that batch had: 15 for batches tested since August 2026, 7 to 14 for earlier ones. The certificate head says the number; the rows show exactly which. A row that says "Not on this report" was not run on that batch.

The 15 tests, one line each

• Is it the right compound? Identity by HPLC-UV/VIS against a reference standard.
• Is it clean? Chromatographic purity by HPLC-UV/VIS, on three vials.
• How much is inside? Net peptide content by HPLC-UV/VIS, on three vials.
• Does the amount match the certificate? Computed from the assay against the stated amount, within the USP 90 to 110% window.
• Do the vials match each other? The spread across the three assayed vials, USP 905 limit.
• Is anything in there that should not be? Adulterant screen by HPLC-UV/VIS.
• Any metal? Arsenic, cadmium, chromium, lead and mercury by ICP-MS, limits per USP 232.
• Any germ dust? Bacterial endotoxins by LAL, USP 85.
• Any leftover cleaning liquid? Residual solvents by GC-MS, USP 467.
• Any leftover cutting acid? Residual TFA by ion chromatography, USP 503.1.
• Is the vial sealed tight? Container-closure integrity by dye ingress, USP 1207.
• Does it dissolve? Solubility, checked by eye.
• Any germs? Five vials, USP 71 growth test at Vanguard Laboratory, 14 days.
• Any germs, the fast way? Four vials, ScanRDI rapid method at Eagle Analytical, an alternative to USP 71.
• Did the lab check its own work? The lab's quality sign-off.

Why nine vials for germs

One clean vial does not prove a clean batch. We have seen batches where two or three vials out of nine failed while the others looked fine. Any failed vial and the batch is destroyed, never sold. Three real examples, with the lab reports, are on Testing & QA.

Where our peptides come from

Raw ingredients come from API manufacturers, which check the raw peptide on receipt. Finished products come from established labs that conform to cGMP-aligned quality systems, in the United States and Taiwan. Our own testing starts on the finished product, at outside labs, and a batch is released or rejected on those results.

Our labs

• Vanguard Laboratory, Olympia, WA. ISO/IEC 17025:2017, A2LA certificate 6377.01.01. The chemistry tests and the two-week germ test. Our lab since February 2025.
• Eagle Analytical Services, Houston, TX. ISO/IEC 17025:2017 (A2LA). The rapid germ count. Our lab since September 2025.
• Ethos Analytics, Phoenix, AZ. ISO/IEC 17025:2017 (PJLA). Second-opinion and re-test chemistry. Our lab since September 2026.

Every new lab has to pass our onboarding checks: no ties to product sellers, ISO/IEC 17025 accreditation from a recognized body, our test methods on its scope of accreditation, USP methods wherever one exists, and testing run under GMP or GLP.

What it costs

Analytical testing runs roughly $3,000 per batch, excluding the overhead on failed batches. It is slower and more expensive than the two or three tests typical in this category, and it means we destroy batches some suppliers would sell.

Verify any batch

Scan the QR code on your vial to open that batch's certificate, or sign in to the Certificates library to search by compound or batch number and see how purity has held across batches. Vanguard will confirm any of its reports by phone or email.

For research use only. Not intended for diagnostic or therapeutic use.

Updated on: 20/09/2026