HERBSEA supplies bulk green tea leaf extract standardized to 20%-40% L-Theanine by HPLC for supplement, beverage powder, tablet, capsule, functional food and private-label formulation projects. Buyers can review the target assay, test method, COA, physical properties, sample requirements and commercial terms before quotation.
L-Theanine Product Path
Compare L-Theanine with Adjacent Green Tea Specifications
L-Theanine projects should confirm HPLC target, COA and grade fit before comparing broader Green Tea Extract, EGCG or instant green tea powder.
- Tea-derived Camellia sinensis leaf extract in fine powder form.
- 20%-40% L-Theanine specification direction, tested by HPLC.
- COA, specification, quality-document and sample review available for qualified B2B projects.
- Request the current MOQ, packing format and lead time for your destination market.
Request COA, samples and an RFQ review with your target assay, application format, estimated quantity and document requirements.
Product Specification Snapshot
| Parameter | Current sourcing direction | Buyer confirmation point |
|---|---|---|
| Ingredient | Green Tea Leaf Extract with L-Theanine | Confirm the material name on the quotation, sample label and COA. |
| Marker range | 20%-40% L-Theanine | Select the target range according to the finished-product specification. |
| Assay method | HPLC | Request the method reference and representative result format. |
| Botanical source | Camellia sinensis leaf | Confirm source and extraction description in the specification package. |
| CAS reference | 3081-61-6 for L-Theanine | Cross-check the CAS reference with the supplied grade and documents. |
| Form | Fine powder for B2B formulation projects | Review particle size, flow, color, odor, taste and blend compatibility. |
| Quality files | COA, specification sheet and available supporting documents | Confirm microbiology, heavy metals, residual-solvent and export-document needs. |
How to Select 20% or 40% L-Theanine
The right assay range depends on formula space, target marker level, sensory profile, finished-product format, cost planning and the buyer’s internal specification. The exact grade should be confirmed against the current specification sheet and representative COA rather than the product name alone.
| Specification direction | Typical project fit | What to test before approval |
|---|---|---|
| 20% L-Theanine by HPLC | Powder blends, beverage concepts and functional food projects where a lower-assay tea-derived material fits the formula. | Flavor, color, particle size, blend uniformity and the final marker calculation. |
| 40% L-Theanine by HPLC | More compact formulas or projects that require a higher marker range from a tea-derived ingredient. | Assay result, sensory profile, flow behavior, solubility and finished-product compatibility. |
| Project-specific target | Custom sourcing discussion based on application, annual demand and destination-market requirements. | Feasibility, sample quantity, MOQ, packing format, lead time and document availability. |
20% vs 40%: Compare the Same Marker Mass
Calculation: required extract mass = target L-Theanine mass / confirmed assay fraction. A 40% grade needs half the extract mass of a 20% grade for the same nominal marker mass.
| Procurement calculation example | 20% assay | 40% assay |
|---|---|---|
| 1 kg nominal L-Theanine marker | 5 kg extract | 2.5 kg extract |
| Cost per kg nominal marker | Quoted cost per kg extract / 0.20 | Quoted cost per kg extract / 0.40 |
This is a raw-material mass-balance example, not a serving recommendation. Use the actual COA result and the same as-is or dry-basis convention; adjust for moisture and process recovery where applicable. Higher assay alone does not establish lower cost, better solubility or equivalent sensory performance.
For beverage projects: request the carrier declaration and test the exact grade at your process temperature, pH and inclusion level. A tea-derived 20%-40% extract is not interchangeable with a 98% L-Theanine monomer or an instant tea powder.
Use the sample approval and batch-matching checklist and download the document request checklist before RFQ.
Formulation Applications and Sample Testing
This tea-derived ingredient may be reviewed for beverage powders, capsule and tablet projects, functional food concepts, dry blends and private-label formulations. Application fit should be established through a controlled sample review using the buyer’s own formula or process.
- Send the target assay, finished-product format, sample quantity and destination market.
- Review the representative COA and specification before testing the sample.
- Check appearance, color, odor, taste, particle size, flow and blend behavior.
- Test the sample in the intended beverage, powder blend, capsule, tablet or food matrix.
- Record the approved sample label, lot number, specification version and feedback for repeat orders.
For a wider comparison between tea-derived extract and soluble tea powder, see the Instant Green Tea Powder page and the Green Tea Extract page.
COA and Quality Documentation Checklist
| Document or test area | Buyer review point |
|---|---|
| Specification sheet | Ingredient identity, assay range, appearance, physical limits, quality limits and packing notes. |
| Representative COA | Batch number, HPLC method, assay result, issue date, appearance and the agreed specification limits. |
| Microbiology | Applicable total counts, yeast and mold, pathogens and buyer-specific acceptance limits. |
| Heavy metals | Testing method and results for the buyer’s destination-market and internal QA requirements. |
| Residual solvents | Applicable extraction-process review and current test information where required. |
| Process and packing files | Process description or flow chart, inner and outer packaging, net weight, label fields and shipment documents. |
Compare the COA with the specification sheet, sample label and quotation item name. The batch number should remain traceable across the sample, COA and commercial shipment. For a document-focused review, use the L-Theanine COA and SDS/MSDS supplier documentation guide.
MOQ, Packaging and Lead-Time Planning
MOQ, packing format and lead time depend on the selected assay range, annual demand, destination, packaging preference and current production schedule. Include these details in the first RFQ so HERBSEA can confirm a practical supply route.
- Target specification: 20%, 40% or another project-defined HPLC range.
- Estimated sample quantity and annual or first-order volume.
- Preferred packing format, net weight and label requirements.
- Destination country, importer requirements and requested export files.
- Target delivery window and repeat-order expectations.
Bulk Supplier Review Scorecard
Use the same checkpoints when comparing suppliers or approving a repeat source. A quotation is easier to evaluate when the material identity, test evidence and supply terms are recorded together.
| Review checkpoint | Evidence to request | Approval question |
|---|---|---|
| Identity and source | Botanical source, material name, assay direction and process description | Does the supplied grade match the intended green tea extract specification? |
| Assay and method | HPLC method reference, representative result and specification limits | Can the buyer’s QC team compare the result with its internal method? |
| Batch documentation | COA, lot number, issue date and matching sample label | Is the sample-to-batch record traceable before approval? |
| Physical and formulation fit | Appearance, particle size, color, odor, taste and blend or dispersion notes | Does the material perform in the intended matrix and process? |
| Supply execution | MOQ, packing format, lead time, annual capacity and repeat-order plan | Can the supplier support the launch schedule and replenishment cycle? |
| Destination documentation | SDS, export files, packing details and destination-market document list | Can the importer and QA team complete their review with the supplied file set? |
RFQ Checklist for Bulk L-Theanine Green Tea Extract
A complete RFQ helps the supplier match the material and document package to the project. Send:
- Product name and target L-Theanine assay.
- Analytical method or internal specification.
- Finished-product format and intended formulation matrix.
- Sample quantity and internal testing plan.
- Estimated order quantity, annual demand and target delivery window.
- Destination market, packing preference and label requirements.
- Required files, such as COA, specification, process information, microbiology, heavy metals, residual-solvent review and export documents.
Related Technical Resources
- L-Theanine in Green Tea Extract HPLC and COA Guide for assay and document questions.
- Green Tea Extract Bulk Supplier Questionnaire for supplier review and RFQ preparation.
- Green Tea Extract COA vs Specification Sheet for batch and specification comparison.
- Contact HERBSEA to request current availability, samples and quotation details.
FAQ: L-Theanine Green Tea Extract 20%-40% HPLC
HERBSEA can discuss green tea leaf extract standardized to 20%-40% L-Theanine by HPLC. Confirm the target assay range, method, application, sample quantity and document requirements before quotation.
Review the specification sheet, representative COA, HPLC assay information, microbiology, heavy metals, residual-solvent information where applicable, packing details and export documents required for the destination market.
Sample support and COA review are available for many qualified B2B projects. Buyers can confirm the grade, specification fit, packing format and document set before moving to a commercial order.
L-Theanine green tea extract is selected for a documented L-Theanine assay and HPLC review. Instant green tea powder is selected mainly for tea flavor, color, beverage-base solubility and sensory profile.
Include the target assay, finished-product format, sample quantity, estimated order volume, destination market, packaging preference, delivery window and required documents such as the COA and specification sheet.
Request a Sample or Quote
Send your target assay, application format, estimated quantity, destination market, packing preference and required files. HERBSEA can then confirm the current specification, sample route, MOQ, lead time and quotation details for your project.
Contact HERBSEA for L-Theanine green tea extract samples, COA and RFQ support.