A PRACTICAL GUIDE FOR INGREDIENT BUYERS
How to source botanical extracts with a clear specification
A useful quotation starts with a defined ingredient, a named assay and enough information about your application. Use this checklist to compare proposals on the same basis.
1. Define the raw material and format
Include the common name, botanical or fungal species, and plant part or mushroom material. Then specify the format: whole-material powder, juice powder, extract ratio or standardized extract. A short name such as “bilberry powder” leaves several purchasing decisions unresolved.
For example, our catalog lists European bilberry (Vaccinium myrtillus), bog bilberry (Vaccinium uliginosum) and blueberry (Vaccinium corymbosum) separately. Ask for the identity records relevant to the material you intend to buy.
2. Pair the compound with the test method
A percentage without a defined analyte and method is an incomplete specification. Ask for the named compound or compound group, target range, analytical method, reference standard and reporting basis. If your own specification uses a different method, resolve that difference before comparing results.
| Ingredient example | What to clarify |
|---|---|
| Cranberry extract | Does the PAC specification use UV, DMAC or BL-DMAC? Which protocol and reference standard are used? |
| Turmeric extract | Does the HPLC result report curcumin or total curcuminoids? Which components are included? |
| Green tea extract | Are polyphenols, catechins, EGCG and caffeine specified separately where needed? |
| Lion’s mane extract | Is the requirement total polysaccharides or a separately defined beta-glucan assay? |
| Phycocyanin | What measurement conditions define the E color value, and what is the full composition? |
An extract ratio and a marker percentage also answer different questions. If you require both, list both and ask how each is established for the proposed grade.
3. Ask what is in the finished ingredient
Request a full ingredient declaration, including carriers and their proportions where applicable. Ask about the extraction process, extraction solvents and any added components that matter to your sourcing brief. For a vitamin C ingredient, for example, clarify whether added ascorbic acid is acceptable.
Include practical formulation requirements: particle size, moisture, bulk density, color, taste and dispersibility. Select the properties that matter to your process instead of assuming the marker assay predicts how the powder will perform.
4. Review documents and evaluate a sample
Request the current product specification and a representative certificate of analysis (COA). Distinguish a specification’s acceptance limits from the results reported for a particular lot. At order stage, ask how the delivered lot and its COA will be identified.
- Identity and marker assay, with the analytical method stated.
- Composition, carrier information and relevant allergen statements.
- Microbiological limits and results, plus heavy metals, pesticides and residual solvents where required by your purchasing specification.
- Storage conditions, packaging and shelf-life information for the proposed grade.
- Current product-specific certification documents if certification is a purchasing requirement.
For organic ingredient options, review the named operator, certificate validity and product scope for your destination before relying on an organic claim. Evaluate a sample in your own formulation and record the grade and lot used for that trial.
5. Send a complete quotation brief
Use the template below to reduce follow-up questions. If a value is undecided, mark it “to discuss” rather than leaving the supplier to assume it.
Ingredient: common name, species, plant part / mushroom material
Format: powder, juice powder, extract ratio or standardized extract
Target specification: compound, percentage, method and reporting basis
Composition: permitted carriers and any excluded ingredients
Application: finished-product format and key processing conditions
Quantity: trial quantity, initial order and estimated repeat demand
Destination: country, delivery location and preferred delivery terms
Documents: specification, COA and any additional required statements
Sample: amount needed and evaluation criteria
Ask the quotation to confirm minimum order quantity, packaging, price basis, quotation validity, payment terms, sample arrangements and lead time. Compare the total delivered cost and the agreed specification together.
This guide supports a purchasing discussion. Specifications and documents must be confirmed for the proposed ingredient and intended use.