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Contract Testing Insights
Quality control guides, regulatory updates, and raw material verification insights for supplement manufacturers, cosmetic brands, and contract manufacturers.
Beyond the COA: How Analytical Testing Labs Detect Adulteration in Botanical Raw Materials
Supplier COAs alone won't protect your brand. See how analytical testing labs catch species substitution, fillers, and undeclared pharmaceutical adulterants.
Amazon's Supplement Enforcement Is Tightening — The COA Documentation Gap Midwest Brands Must Close
Amazon now requires ISO/IEC 17025 COAs for supplement listings. Here's the DSHEA documentation gap Midwest brands must close to avoid delisting.
The Raw Material Specification Sheet: What 21 CFR Part 111 Actually Requires (And the 5 Elements Brands Keep Missing)
What 21 CFR Part 111 §111.70 actually requires for botanical raw material spec sheets—and the 5 elements Midwest supplement brands consistently miss.
Why ICP-MS Is the Only Method That Satisfies USP <232>/<233> for Herbal Supplement Heavy Metals
Herbal ingredients concentrate heavy metals. Here's why ICP-MS is the only method that satisfies USP <232>/<233>, and what a compliant CoA actually looks like.
What an Analytical Testing Lab Finds When Screening Ashwagandha, Turmeric, and Elderberry for Adulteration
Three of the supplement industry's most adulterated botanicals — and exactly what a qualified analytical testing lab looks for when screening raw material lots.
Stability Testing for Herbal Supplements: What DSHEA Requires and Why Your Expiration Date Is a Legal Claim
Supplement expiration dates must be backed by stability data under 21 CFR Part 111. Here's what a proper protocol for herbal products actually requires.
Out-of-Specification Incoming Raw Materials: The Two-Phase Investigation Process GMP Auditors Want to See
When an incoming raw material fails testing, a superficial investigation is worse than none at all. Here's the two-phase OOS framework GMP auditors actually expect.
The Supplier Audit Checklist Every Raw Material Buyer Needs Before Approving a New Source
A practical on-site supplier audit checklist for supplement and cosmetic raw material buyers — what to examine beyond the paperwork, and why analytical testing still follows.
Environmental Monitoring Programs for Supplement Manufacturing: What GMP Auditors Actually Expect
What 21 CFR Part 111 requires from your environmental monitoring program — and why finished product testing alone leaves a critical contamination gap.
Nitrogen Spiking in Protein Raw Materials: How an Analytical Testing Laboratory Detects What a COA Misses
Your supplier's COA can't detect amino acid spiking — Kjeldahl never could. Here's how an analytical testing laboratory catches protein adulteration before it reaches your line.
The Supplement Manufacturer's Guide to Risk-Based Supplier Tiering
Build a risk-based supplier tiering program that satisfies FDA 21 CFR Part 111 audits and directs analytical testing laboratory resources where risk is highest.
Technology Transfer to a Contract Analytical Laboratory: A Step-by-Step Method Comparability Guide
When method transfer to a contract analytical laboratory fails, it's rarely the chemistry. Here's a structured framework for ensuring comparability before the first lot ships.
DNA Barcoding for Botanical Ingredient Authentication: What Your Contract Lab Should Be Offering
DNA barcoding is transforming how analytical testing laboratories verify botanical identity. Here's what it does well, where it falls short, and how to integrate it effectively.
COA Red Flags: How to Verify Your Overseas Supplier's Testing Data Before Raw Materials Ship
Spot COA red flags from overseas suppliers and learn how an analytical testing laboratory verifies raw material data before it reaches your facility.
In-House vs. Contract Testing Laboratory: A Real Cost-Benefit Analysis for Raw Material Buyers
Supplement brands routinely underestimate the true cost of in-house analytical testing. Here's an honest breakdown of when a contract testing laboratory wins — and when it doesn't.
Microbiological Limits for Herbal Raw Materials: What USP <61>, <62>, and <1111> Actually Require
A technical guide to USP microbiological acceptance criteria for herbal raw materials — limits, methods, and how to set tighter internal specs that protect finished product quality.
Risk-Based Raw Material Sampling: How Often Should You Actually Test Incoming Ingredients?
A practical framework for raw material testing frequency based on supplier risk tiers, 21 CFR 111 requirements, and C=0 sampling plan best practices.
Quality Agreements with Your Contract Analytical Testing Laboratory: 10 Clauses Most Manufacturers Miss
A quality agreement with your contract analytical testing laboratory isn't optional under GMP. Here are 10 essential clauses — and why most manufacturers' agreements fall short.