Research

How we assess supplement manufacturers, and the references we publish along the way.

Method

The six gates we apply when reviewing a manufacturer. Where our data comes from, and what our listings do and do not represent.

Practical guides for evaluating supply chain partners, navigating compliance, and avoiding common pitfalls.

Plain definitions for cGMP, COA, third-party testing, and 30+ industry terms you encounter when building a supplement brand.

Scope, independence, and limitations for the certification programs that matter most. What each one covers, and what it does not.

New to supplement manufacturing. Begin with the basics before evaluating any vendor.