Ascension Peptides
Premium US vendor (Castle Rock, CO, 2024) with the strongest documented testing of the set: triple verification (HPLC + MS identity + LAL endotoxin) on every batch via MZ Biolabs, public batch-specific COA library, recent purity 99.4-99.98%, 4.7★ Trustpilot (96 reviews). Value is discount-dependent — premium list price ($60 BPC-157 10mg = $6/mg) only competes after the 50% code.
Score breakdown
Strengths
- Triple-verification on every batch (HPLC+MS+LAL) — only seeded vendor doing all three
- Public batch-specific COA library, MZ Biolabs verified, 99.4-99.98% recent purity
- Fast US domestic shipping (2-4 days) with cold-chain option
- 4.7★ Trustpilot across 96 verified reviews; zero contamination reports
Weaknesses
- Discount-dependent value — base prices premium, collapse to competitive only after 50% off
- Smaller catalog (~21-25 compounds), no rare/niche peptides
- US-only shipping; age-gated site adds friction
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
Ascension Peptides: 0.40×9.5 + 0.30×9.5 + 0.15×8 + 0.15×6.5 = 8.8
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.