Research
How we assess supplement manufacturers, and the references we publish along the way.
The Certification Verification Gap
Original 2026 data: most certification claims in the supplement supply chain cite credential types no public registry can confirm. Versioned study with the full method published.
Read more →FDA Enforcement Screening: Method and Limits
How we screen directory companies against FDA recall and enforcement data: the datasets, the matching method and its limits, and what “no unresolved enforcement” does and does not mean.
Read more →Method
The six checks we apply when reviewing a manufacturer. Where our data comes from, and what our listings do and do not represent.
Read more →Guides
Practical guides for evaluating supply chain partners, navigating compliance, and avoiding common pitfalls.
Read more →Glossary
Plain definitions for cGMP, COA, third-party testing, and 30+ industry terms you encounter when building a supplement brand.
Read more →Certifications
Scope, independence, and limitations for the certification programs that matter most. What each one covers, and what it does not.
Read more →Branded Ingredients
Who owns each branded ingredient, how licensing works, and whether supply is open to new customers right now. Dated statuses with sources.
Read more →Start Here
New to supplement manufacturing. Begin with the basics before evaluating any vendor.
Read more →