Verdict: Tied on evidence at 10/10. What separates them: review base (4.8 (101 reviews) vs 4.6 (65 reviews)), and price — Purgo Labs cheaper on 5, Peptide Giants on 17 of 23 like-for-like vials.
Check it yourself: Purgo's lab-reports page carries a 'View at lab' link per lot to SteriGenix's verification portal (read 24 Sep 2026); enter the lot's report number there. The button above opens the lab's lookup.
Lot page lists test date and measured net peptide; 'View at lab' link to the SteriGenix portal on the lab-reports page (re-read 24 Sep 2026).
This certificate does not state measured net content — purity alone does not tell you how much is in the vial, which is why the rubric scores them separately.
Check it yourself: Enter the report/test number and the key printed on the certificate. The button above opens the lab's lookup.
Resolves on verify.janoshik.com; net-content line not transcribed at read time.
Other certificates we opened at Peptide Giants: 1
1 verifiable at the lab1 state measured massmedian purity 99.30%median fill 98.4% of labellast read 2026-09-06
Product · lot
Lab
Purity
Measured vs label
Verify
TB-500 5mglot PG-5101
Vanguard Laboratory
99.3%
4.92 mg98.4% of label
vendor-hosted
Each row is a certificate we opened and read ourselves; "verify at the lab" goes to the laboratory's own lookup, never a copy we host. Full COA library →
