Methodology
UPV Transparency Index
The Transparency Index is an original USA Peptide Vendors editorial score from 1–100. It is designed for research procurement hygiene — not clinical endorsement.
Pillars
Documentation (40%) — public lot IDs, dated assays, purity and content where available, and whether certificates appear independently hosted.
Entity clarity (20%) — named business presence, contact pathways, and US-facing operational language.
Shipping honesty (20%) — domestic fulfillment claims, tracking expectations, and stock visibility.
RUO labeling (20%) — consistent Research Use Only / not for human consumption language on product surfaces.
What we do not score
Medical outcomes, “best for beginners” lifestyle claims, or paid placement. Affiliate relationships never set rank order.
Read vendor pages for last-reviewed dates and source notes. Some profiles are illustrative for directory structure and are labeled accordingly.