In short: Plant extracts are specification-driven products — one product name can describe dozens of different materials. Ten questions separate a verifiable supplier from a hopeful one, and they cluster into four groups: identity (what exactly is it), evidence (what can they prove), commercials (MOQ, lead time, packaging) and process (traceability and deviation handling). Ask all ten before the first purchase order. If three or more answers are vague, you are talking to a trading desk rather than a manufacturer.
Why these ten
A single name — “garlic powder”, “curcumin extract”, “wild yam extract” — can describe products that differ in botanical source, plant part, standardization level, analytical method and carrier. Price differences between two quotes for the “same” product are usually specification differences, not margin differences. These ten questions are the shortest path to finding out which one you are actually being offered.
The questions, grouped
| # | Group | Question | An acceptable answer looks like |
|---|---|---|---|
| 1 | Identity | What exactly is the specification? | Botanical source (Latin name), plant part, ratio or standardised marker with value, particle size, solvent |
| 2 | Identity | What does the COA actually test? | Marker quantified by a named method, plus appearance, loss on drying, heavy metals, microbiology |
| 3 | Evidence | Can I see COAs from multiple batches? | Three batches supplied and comparable to each other |
| 4 | Commercials | What is the MOQ — and what happens below it? | Per-item MOQ, statement of batch basis, and whether a paid trial order is accepted |
| 5 | Commercials | What is the realistic lead time? | Days from order confirmation to shipment, with third-party testing and documentation called out separately |
| 6 | Commercials | How is the product packaged and stored? | Inner and outer packaging named, net weight per unit, storage conditions stated |
| 7 | Evidence | What certifications do you hold — and are they current? | Certificate body, number, scope and expiry — verifiable on the body’s database |
| 8 | Evidence | Can you provide a sample from the same batch as the COA? | Sample drawn from the documented batch, not an equivalent lot |
| 9 | Evidence | Do you perform third-party testing? | Named accredited labs and willingness to share reports |
| 10 | Process | How do you handle traceability and deviations? | Batch-record walk-through from raw botanical lot to finished powder, plus a described CAPA process |
The ten questions in detail
1. What exactly is the specification?
Never order by name alone. Confirm the botanical source with its Latin name, the plant part used, the extraction ratio or the standardised marker with its value (for example diosgenin 12.5%, withanolides 7%), particle size, and the extraction solvent. These five items are the minimum basis on which two quotes can be compared at all.
2. What does the COA actually test?
Request the COA and check that the marker is quantified by a named method — HPLC where specificity matters — alongside appearance, loss on drying, heavy metals and microbiology. A COA that lists a percentage without a method cannot be enforced if your laboratory returns a different figure.
3. Can I see COAs from multiple batches?
One COA proves one batch. Request three batches and compare them side by side. Consistency across batches is the strongest single signal of process control, and it is the evidence no trading desk can produce on demand.
4. What is the MOQ — and what happens below it?
Confirm the MOQ per item and whether a smaller trial order is possible, usually at a price premium or with a longer lead time. Also ask whether the MOQ applies per batch or per order: if the MOQ is one production batch, splitting that batch across several SKUs can lower the per-item minimum.
5. What is the realistic lead time?
Ask for lead time from order confirmation to shipment, not an “in stock” figure. Have them break it down: production, optional third-party testing, packaging and export documentation, and inland transport to port. A quote that treats these as one number hides exactly the component that will delay you.
6. How is the product packaged and stored?
Ask about inner packaging (for example double PE bags), outer packaging (fibre drum versus carton), net weight per unit, and recommended storage conditions. Packaging decisions interact with the material’s hygroscopicity, so specify both together or neither.
7. What certifications do you hold — and are they current?
FSSC 22000, HACCP, HALAL, KOSHER, organic. Verify the certification body, the scope statement and the expiry date on the certificate itself — not the logo on a brochure. A certificate is held by a specific legal entity and covers specific products; both need to match your order.
8. Can you provide a sample from the same batch as the COA?
A sample is only meaningful if it comes from the same batch as the documentation you evaluated. Ask explicitly. Then test the marker and the identity, and compare the result with the stated specification rather than with your impression of the powder.
9. Do you perform third-party testing?
Ask whether products are routinely tested by accredited third-party laboratories — SGS, Eurofins, Intertek or equivalent — and whether the reports can be shared. Third-party evidence is worth more than any internal result because it is outside the supplier’s control.
10. How do you handle traceability and deviations?
Ask them to walk you through a batch record, from the raw botanical lot through to the finished powder. Then ask what happens when a batch fails. A manufacturer describes a documented CAPA process; a reseller changes the subject.
Which document answers which question
| Question | Document that answers it | What to look for inside |
|---|---|---|
| 1. Specification | Written specification sheet | Latin name, plant part, marker with value, particle size, solvent |
| 2. COA content | Batch COA | Named method next to the marker; the full physicochemical and microbiological panel |
| 3. Batch consistency | Three batch COAs | Whether the marker and the LOD sit in a stable range across batches |
| 4. MOQ | Quotation with batch basis stated | Whether the minimum is per item or per production batch |
| 5. Lead time | Quotation with itemised lead-time components | Whether third-party testing and documentation are inside or outside the figure |
| 6. Packaging and storage | Packaging specification | Inner and outer packaging, net weight per unit, storage conditions |
| 7. Certifications | Certificate with number, scope and expiry | Holder matches the manufacturing entity; scope covers your product |
| 8. Same-batch sample | Sample with its batch number quoted | The batch number matches the COA you evaluated |
| 9. Third-party testing | Third-party laboratory report | Accredited laboratory named, sample identity and date present |
| 10. Traceability and CAPA | Batch record walk-through, plus a written CAPA procedure | Raw botanical lot to finished powder; a described deviation process |
How to read the answers
| Signal | What it means | Action |
|---|---|---|
| Answers 1, 2, 7 and 10 with specific documents | Verifiable manufacturer with a functioning quality system | Progress to sample and specification lock |
| Answers 4 and 5 with a breakdown, not a single figure | They understand their own production, not just their price list | Ask for a tiered price list and lock the lead-time components |
| Vague on method but precise on price | Selling a different specification than you asked for | Re-specify in writing before negotiating further |
| Three or more questions deflected | Likely a trading desk with no documentation of its own | Deprioritise; the documents will not appear at order stage either |
FAQ
Can I skip these questions if the price is clearly the lowest?
No — a low price on an unspecified product is the most common cause of a rejected or unusable shipment. Compare quotes only after all of them share the same specification block; otherwise you are comparing different products.
Which question matters most?
The specification question, because every other answer depends on it. Once the specification names the marker, the method and the limits, the remaining nine questions become verifiable rather than impressionistic.
How many batches should I compare?
Three is the practical minimum. Two batches show you a range; three show you whether that range is stable. A supplier who cannot produce three batch COAs for a catalogue product is telling you something about their documentation discipline.
What if the supplier refuses to provide a batch-level COA before ordering?
Treat it as an unanswered question rather than a formality. Batch-level documentation is how the product is released; if it cannot be shown before the order, you will have no baseline to compare the delivered material against.
Should I insist on HPLC over UV?
Insist on whichever method your label, dossier or customer requires, and have it named in the specification. UV is a legitimate method for total-content figures; HPLC is needed where a specific compound is claimed. The mistake is leaving the method unspecified.
Do trial orders below MOQ actually exist?
Often yes, at a premium or with a longer lead time, because a small run consumes the same setup and QC effort as a full batch. Ask explicitly instead of assuming the MOQ is negotiable.
How do I verify a certification quickly?
Take the certificate number and the issuing body from the document and look the number up on that body’s public database. If it cannot be resolved anywhere, treat the certificate as unconfirmed regardless of the scan quality.
What is the single most useful thing to bring to the conversation?
A written specification. It converts the exchange from a negotiation about price into a comparison about a defined product — and it becomes the document that production is judged against.
LongBio answers all ten questions with documents, not descriptions — certificate register, batch COAs on request.