Editorial Policy & Scoring Method

Every supplier is assessed with the same method, and every factual claim is tagged as Verified (we checked the document ourselves) or Vendor claim (the supplier's own statement).

Scoring method

• Lab evidence (40%): batch-specific COA, named third-party lab, HPLC purity and mass-spec identity, checked at the lab's own site.
• Price per mg (25%): normalized across vial sizes and current discounts.
• Independent reputation (20%): blind-test services and community discussion the vendor does not control.
• Policies (15%): refund, shipping and terms checked against site banners.

Automatic exclusions

We do not recommend a supplier that markets products for human use, publishes dosing or injection guidance, sells compounds named in 2026 FDA warning letters, or has received an FDA warning letter for unapproved drugs.

Updates and corrections

Reviews show the date they were last checked. If you find an error, contact us and we will correct it and note the change.