Polaris Peptides
Members-only US vendor with strong independent results: Finnrick median 99.8% across 99 samples and a 100% identity pass rate. COAs sit behind a members login, and batch-to-batch variance is reported on some products (e.g. retatrutide).
Score breakdown
Strengths
- Finnrick-verified 99.8% median (99 samples), 100% identity pass
- HPLC + MS testing
- Batch-specific COAs (members)
- Loyalty rewards program
Weaknesses
- Members-only model limits open transparency
- Reported batch-to-batch variance on some products
- Affiliate commission % not disclosed
- Mixed customer-service reports
How we rank
One formula, the same for every vendor including our partner. Argue with the weights — that's the point.
Overall = 0.40 × Transparency + 0.30 × Purity + 0.15 × Shipping + 0.15 × Value
Polaris Peptides: 0.40×7 + 0.30×8 + 0.15×7 + 0.15×6 = 7.2
How each axis is scored
Transparency (×0.4). COA depth, named third-party labs, breadth of test types (HPLC base; +MS, +LAL, +heavy metals, +sterility), public batch traceability. Claim-only purity (no hosted PDF) caps this axis.
Purity (×0.3). Median/recent batch purity from hosted COAs + independent lab confirmation (Finnrick/Janoshik). Self-reported '99%+' with no batch PDFs scores low.
Shipping (×0.15). US-domestic speed/reliability and stock consistency from real shipping data; international-only or undisclosed scores lower.
Value (×0.15). Purity-adjusted price per mg vs the cross-vendor median for the same peptide/vial; discount-dependency penalized.
Reviews
Why trust this comparison
- Every vendor is scored from real evidence on four public, weighted axes — before we know any margins.
- Purity claims are cross-checked against named third-party labs (MZ Biolabs, Finnrick, Janoshik). Claim-only purity is marked as such.
- The scoring code can't read which vendor pays us — the editorial-commerce firewall is enforced in software.
- We disclose the 20% / 10% Alpha Pro commission on every page, above the first link.
Vendors out-rank our own partner: Peptide Partners (9.0) and Protide Health (8.9) and Ascension Peptides (8.8) both score above Alpha Pro (8.6). We left it that way.