Guides
Supplement & lab testing guides
No-fluff, practical guides on what to test, what it costs, and how to stay compliant — written for supplement and consumer-product brands.
Cost & Pricing· 11 minHow Much Does Supplement Testing Actually Cost?
Real supplement testing costs with no fluff — identity, potency, heavy metals, microbial, stability and full GMP panels — plus how to avoid overpaying. Actual price ranges from lab quotes.
Amazon & Marketplace· 23 minAmazon Supplement Compliance: Don't Get Delisted
Exactly what testing Amazon requires to sell supplements — third-party COA, GMP certificate, identity, potency, heavy metals and microbial — plus real costs, the appeal process, and a full compliance checklist.
FDA & GMP· 26 minThe "Oh Crap, The FDA Is Calling" Guide to 21 CFR 111 Testing Requirements
Every dietary supplement testing requirement in 21 CFR Part 111 — raw material, in-process, and finished product testing, identity testing rules, common FDA 483 citations, and a full GMP compliance checklist.