Vendors
Ranked by average test purity and identity-confirmation rate across every lab result we've tracked (vendor COAs and independent tests alike). Vendors need at least 3 results before we rank them.
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M-Peptide Science
1 flagged batch52 batches51 tests
99.8%
avg purity
SPB
1 flagged batch117 batches20 tests100% identity pass rate
99.7%
avg purity
GYC/GGpeps
37 batches10 tests
99.7%
avg purity
JEEP
42 batches69 tests100% identity pass rate
99.6%
avg purity
Aavant
54 batches21 tests100% identity pass rate
99.5%
avg purity
XTP
1 flagged batch21 batches11 tests0% identity pass rate
99.4%
avg purity
Uther
2 flagged batches572 batches631 tests92% identity pass rate
99.2%
avg purity
Lobster
23 batches30 tests95% identity pass rate
98.7%
avg purity
Building a track record
Fewer than 3 test results so far — not enough data to rank yet.