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Head-to-Head · 2026

Pure Peptides USA vs Science.bio

Independent side-by-side comparison — PVS scores, lab-verified purity, CoA coverage, and community sentiment. Rankings based solely on data; no paid placements, ever.

Higher PVS60PVS
Pure Peptides USA

EU · 99.1% reported purity · 67+ CoAs

PepAssure VerifiedFull Pure Peptides USA report
15PVS
Science.bio

USA · 99.2% reported purity · 73+ CoAs

PepAssure VerifiedFull Science.bio report

The short answer

Pure Peptides USA currently holds the higher Peptide Verification Score — 60/100 vs 15/100 for Science.bio. The pillar breakdown below shows where each vendor earns (or loses) points across purity testing, CoA verification, community sentiment, transparency, and order experience — see the scoring methodology for how the PVS is computed.

Pillar-by-pillar breakdown

Pure Peptides USA (left) vs Science.bio (right) — green marks the stronger pillar. “—” means insufficient data.

84Purity86
82CoA84
80Sentiment82
80Transparency80
75Experience83

At a glance

MetricPure Peptides USAScience.bio
PVS score60/100★15/100
Reported purity99.1%99.2%★
CoAs on file6773★
Sentiment80%82%★
Last tested4 months ago4 months ago
LabJanoshikJanoshik
Price tier$$$
CategoryThymosin Alpha-1Tirzepatide
Shipping4-6 days5-7 days
LocationEUUSA

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Rankings based solely on data. No paid placements — ever.