Each vendor is scored across 7 categories, weighted by their importance to safe and informed purchasing. Maximum score: 100.
20
Price Efficiency
Price per mg normalised across all vendors. Lowest effective cost scores highest, with small penalties for hidden fees.
20
Purity Verification
COA (+5), batch-specific COA (+4), HPLC (+4), NMR (+4), third-party tested (+3). Full stack = 20/20.
15
Transparency
Real company identity, clear purity claims, disclosed testing method, lot traceability, and visible contact/support information.
15
Brand Trust
Professional storefront, consistent product data, visible policy pages, community reputation, and absence of red flags.
10
Delivery & Logistics
EU and US shipping coverage, stated delivery times, packaging clarity, and order reliability.
10
Product Range
Availability of SLU-PP-332 and SLU-PP-915, related compounds, multiple formats (liquid/powder), and quantity options.
10
UX & Professionalism
Clean product pages, lab document accessibility, simple checkout flow, and no broken or suspicious UI elements.
Elite 90–100 — Top-tier vendor
Excellent 80–89 — Very strong option
Good 70–79 — Solid with some gaps
Average 60–69 — Usable but limited
Weak <60 — Low confidence