Stop guessing. Buy peptides that are actually pure.

We independently lab-test peptide vendors — anonymously buying their products and sending them to an accredited lab — then rank them on one honest Trust Score. No paid rankings.

See the vendor rankings → How we test
6vendors tracked
0independently verified
0lab tests run
6compounds compared

🏆 Trust Score leaderboard

Scored on independent testing, published COAs, US-domestic shipping & community standing — never on who pays us.

1
PureVial Labs
Strong community standing; publishes third-party tests.
75
Strong
2
Apex Research Peptides
US-domestic vendor that posts batch COAs.
69
Fair
3
Meridian Compounds
Domestic fulfillment, endotoxin + sterility panels.
63
Fair
4
Helix Biologics
Wider catalog; some overseas fulfillment.
43
Unproven
5
Northgate Peptides
Newer domestic vendor; COAs inconsistent.
32
Unproven
6
Vector Research Chem
Cheap pricing, little transparency — caution.
6
Unproven

See all 6 vendors →

Why PeptideProof

1
We buy anonymously
No "send us a free sample" — we shop like a normal customer, so vendors can't game us.
2
An accredited lab tests it
HPLC purity + mass-spec identity at Janoshik — the lab the research community trusts.
3
We publish the receipts
The real purity number and the COA, good or bad. Only ≥98% earns the Verified badge.