Most buyers get burned the same way. They find a supplier on Alibaba, get a clean-looking COA, exchange a few polite emails, place a $15,000 order — and three months later the product that arrives bears no resemblance to what was quoted. Wrong extract ratio. Wrong color. Sometimes just straight-up filler.
The frustrating part is that none of those suppliers looked shady beforehand. They had good reviews, fast responses, professional-sounding company names. So how do you tell the difference before you wire the money?
Start with the boring stuff: registration, not brochures
Every legitimate manufacturer in China is registered with local authorities and has an accessible business license. Ask for the Business License (营业执照) and the Food Production License (食品生产许可证) if you're buying food-grade material. Cross-reference the company name and registration number on China's National Enterprise Credit Information Publicity System (qixin.gov.cn — it's in Chinese but Google Translate gets you there).
If the registration is less than two years old and they claim to have 15 years of experience, that's worth a conversation. Sometimes it's fine — company restructuring happens. But you want to understand why.
Third-party testing: yours, not theirs
Every supplier will send you a COA. The question is who ran the tests. In-house labs can produce whatever number a sales team needs. What you want is a COA from an accredited third-party lab — Eurofins, SGS, Intertek, or equivalent. Ask if they've had a recent third-party test run on the specific batch you're buying. If they say yes, ask to see it. If they hesitate, that hesitation is information.
Better yet: once you receive a sample, send it to your own lab before committing to a bulk order. The cost is usually $200–400 per test panel. Cheap insurance against a bad shipment worth ten times more.
The video call test
Ask for a video call and ask them to walk you through the facility. This isn't foolproof — people can stage things — but a real manufacturer will do this without drama. A trading company pretending to be a manufacturer will usually find a reason to avoid it, or they'll show you a facility they don't control.
During the call, watch for specifics: Are there workers in the background? Do the extraction tanks look the right size for their claimed output? Does the person showing you around actually understand what they're looking at, or are they reading from a script?
Check the certifications against the product
GMP certification doesn't mean the same thing everywhere. China GMP, EU GMP, and US FDA GMP are meaningfully different. A supplier certified for one doesn't automatically qualify for the others. If you're selling into the US market and need FDA-compliant ingredients, make sure that's the specific standard they're certified under — not just "GMP" as a general claim.
Same applies to HALAL, KOSHER, and organic. Ask to see the actual certificate, not just a logo on a brochure. Certificates have issue dates and expiration dates. If the one they share expired two years ago, that's not a current certification.
What realistic MOQs look like
Here's something counterintuitive: an extremely low MOQ can be a warning sign. Legitimate extract manufacturers work with industrial equipment that doesn't make economic sense at very small batch sizes. If someone quotes you 1kg MOQ on a specialized extract that normally runs $80–120/kg, ask yourself how they're making that work. Often the answer involves blending, substitution, or inflated concentration numbers.
A supplier who gives you a realistic MOQ — often 25kg for most extracts, sometimes 50–100kg for specialized material — and can explain the production logic is usually more trustworthy than one who'll match whatever quantity you ask for.
The relationship matters more than the contract
Contracts with Chinese suppliers are enforceable but enforcement is slow and expensive. The more reliable protection is building a relationship where the supplier has a reputational stake in keeping your business. That means starting with smaller orders, paying on time, and not squeezing every cent out of the price negotiation.
Suppliers who like working with you will prioritize your orders, flag quality issues proactively, and give early notice of material shortages. The due diligence process is boring and slow — which is exactly why it works.