How we test

Tested in our own lab. Not outsourced.

Every free community test runs in Sapho Bio's lab in San Carlos, California. It's the same lab, methods and instruments that compounding pharmacies use for USP lot release.

Request a free test ↗Sapho lab services

Included in every free test

Two assays, one COA per vial

Included freeHPLC

Identity, purity & quantity

One HPLC run, measured against a characterized reference standard, answers three questions about your vial.

Identity: Pass if the main peak's retention time matches the reference standard for the labeled peptide.
Purity: The main peak's share of total peak area (area-percent), so impurities and degradants show up as a lower number.
Quantity: Measured mg in the vial, compared with the mg on the label.

Full method on saphobio.com →

Included freeUSP <85> LAL

Endotoxin

Bacterial endotoxins can cause fever and, at higher doses, septic shock. They survive sterilization, so a product can be sterile and still not be safe.

Endotoxin level: Reported in EU/mg.
Pass / fail: Compared with a limit based on typical dose and route.

Full method on saphobio.com →

Quality and compliance

A lab held to pharma standards

Community tests run under the same quality system Sapho uses for compounding pharmacy lot release. See our full test menu →

2bd: qPCR rapid sterility, aqueous lots (USP <71>: 14-day incubation)
30+: 503A Pharmacy Customers
0: Form 483s or FDA warning letters
60+: Controlled SOPs, versioned in Benchling

DEA registration for controlled substances, such as testosterone
No Form 483s and no warning letters
Methods validated per USP <1223> or <1225>: repeatability, ruggedness, LOD
Instruments qualified routinely (IQ/OQ/PQ)
Trained scientists 60+ SOPs; CAPA database maintained
ISO/IEC 17025 accreditation assessmentQ4 2026
FDA registration with our quality management systemPending

In placeIn progress

Vendor rating

How the score works

A sample that fails identity scores 0. Otherwise its score is a weighted mix of:

Purity40%
Quantity accuracy (1 − |measured − labeled| / labeled)35%
Endotoxin pass25%

Ranking

Recent tests count more

A vendor's rating for a peptide is the recency-weighted mean of its test scores, with a 180-day half-life. A vendor needs at least 2 tests to be ranked.

Community star ratings are shown separately and don't affect the score. See them on the leaderboards.

For brands, manufacturers & pharmacies