Scoring Framework
How We Score Vendors
Our Peptide Index Score™ is a weighted evaluation framework. Rankings follow published criteria and are updated periodically as material information changes are identified.
Methodology version 1.0 · reviewed August 12, 2026
Reproducible formula · version 1.0
How the published score is calculated
Score = (Testing × 25%) + (Transparency × 20%) + (Reputation × 20%) + (Shipping × 7.5%) + (Customer Support × 7.5%) + (Pricing & Value × 20%). Shipping and customer-support observations are presented separately and combine into the 15% Customer Experience component. The published score is displayed on a decimal ten-point scale; rank is calculated by sorting the resulting weighted scores from highest to lowest.
A category score requires documented source material or a recorded observation appropriate to that category. Where a category cannot be supported, Peptide Index should state the limitation rather than infer a score.
Testing Documentation
Testing documentation is one of the most important factors in the scoring system. We look for vendors that publish third-party laboratory materials and make supporting results available for review.
Transparency
Transparency evaluates the availability and clarity of public product information, documentation access, and published quality materials.
Community Reputation
A vendor's reputation is often built over years of customer experiences. We monitor feedback from researchers, community discussions, and long-term performance.
Shipping Information
Shipping information is evaluated separately from customer support and contributes one half of the published Customer Experience component.
Pricing & Value
The lowest price does not automatically receive the highest score. We evaluate whether a vendor provides reasonable value relative to testing, transparency, and overall reputation.
Customer Support Information
Customer-support information is evaluated separately from shipping and contributes the other half of the published Customer Experience component.
Score Updates & Commitment
Vendor scores are reviewed periodically and may change as new information becomes available. Our rankings are intended as an educational comparison tool and should not be interpreted as endorsements, guarantees, or medical recommendations.
PeptideIndex.ca was created to help researchers compare vendors using objective criteria whenever possible. Our goal is to provide a transparent framework that makes it easier to evaluate testing standards, reputation, transparency, customer experience, and overall value.