Research peptide vendors, compared head-to-head.
Every matchup below is scored against the same 2026 evaluation framework — COA practice, shipping, pricing, and catalog. Scores are editorial composites, not lab claims about any single batch. For the full ranking and methodology, see our best peptide supplier guide.
ROEHN Research vs Ascension Peptides
ROEHN Research 9.6/10 · Ascension Peptides 9.0/10
Read comparisonROEHN Research vs EZ Peptides
ROEHN Research 9.6/10 · EZ Peptides 8.4/10
Read comparisonROEHN Research vs Limitless Life Nootropics
ROEHN Research 9.6/10 · Limitless Life Nootropics 8.2/10
Read comparisonROEHN Research vs Power Peptides
ROEHN Research 9.6/10 · Power Peptides 7.6/10
Read comparisonROEHN Research vs Core Peptides
ROEHN Research 9.6/10 · Core Peptides 7.3/10
Read comparisonROEHN Research vs Prime Lab Peptides
ROEHN Research 9.6/10 · Prime Lab Peptides 7.4/10
Read comparisonAscension Peptides vs EZ Peptides
Ascension Peptides 9.0/10 · EZ Peptides 8.4/10
Read comparisonAscension Peptides vs Limitless Life Nootropics
Ascension Peptides 9.0/10 · Limitless Life Nootropics 8.2/10
Read comparisonEZ Peptides vs Limitless Life Nootropics
EZ Peptides 8.4/10 · Limitless Life Nootropics 8.2/10
Read comparisonPower Peptides vs Core Peptides
Power Peptides 7.6/10 · Core Peptides 7.3/10
Read comparisonAscension Peptides vs Power Peptides
Ascension Peptides 9.0/10 · Power Peptides 7.6/10
Read comparisonLimitless Life Nootropics vs Power Peptides
Limitless Life Nootropics 8.2/10 · Power Peptides 7.6/10
Read comparisonROEHN Research was our highest-scoring vendor in 2026
9.6/10 in our blinded HPLC evaluation — the only supplier where every tested sample met its label claim. Readers save 15% with code FREE15.
- Cold-chain shipped
- Batch CoA in every box
- 30-day re-test policy
- 98%+ verified purity