B2B INGREDIENT SOURCING GUIDE · UPDATED AUGUST 2026
Bulk Green Tea Extract Sourcing Guide: EGCG 98% Purity, COA Audit & Formulation Considerations
For supplement manufacturers, cosmetic brands, functional food developers and procurement teams, selecting a green tea extract supplier requires more than comparing a headline purity number. Buyers should verify the assay method, product identity, contaminant testing, documentation, supply chain and destination-market requirements.
Quick Technical Summary
- Key ingredients: EGCG, standardized tea polyphenols, catechins and selected green tea extract grades.
- High-purity option: EGCG 98% powder, quantified by HPLC according to the applicable product specification.
- Testing priority: HPLC is generally preferred for individual catechins such as EGCG. A validated UV-Vis method may be used for total polyphenols where appropriate.
- Documentation: Request a batch-specific COA, HPLC chromatogram where available, TDS, SDS/MSDS and relevant contaminant reports.
- Supply model: Blueeyes Bio is a UK-registered supplier working with a GMP-certified manufacturing supply chain in China.
- Commercial flexibility: Evaluation quantities and commercial MOQ depend on the product grade, batch availability and destination requirements.
1. EGCG 98% vs. Tea Polyphenols: Which Grade Should You Choose?
EGCG 98% is a purified, high-potency ingredient, while tea polyphenols are a broader standardized extract measured by total polyphenol content.The correct choice depends on the target active marker, dosage form, label requirements, cost and regulatory pathway.
| Parameter | EGCG 98% Powder | Tea Polyphenols / Green Tea Extract | Organic Green Tea Extract |
|---|---|---|---|
| Primary marker | EGCG ≥98%, subject to product specification and HPLC result | Total tea polyphenols or a defined EGCG level, depending on the grade | Organic-certified extract with the active profile stated in the product specification |
| Analytical focus | Individual catechin profile by HPLC | Total polyphenols by validated method; HPLC profile may also be requested | Active assay plus organic-chain documentation |
| Suitable applications | High-potency supplement and cosmetic formulation development | Botanical supplements, functional foods and beverages | Clean-label and organic product concepts, where certification is available |
| Typical appearance | White to off-white crystalline or fine powder | Yellow, brown or greenish powder, depending on the extraction process | Subject to botanical source and processing conditions |
| Key buyer question | Is the assay specific to EGCG and supported by HPLC data? | Is the total-polyphenol method defined and consistent between batches? | Can the supplier provide the applicable organic certification documents? |
