Green Tea Extract Assay Method Review

Compare green tea extract suppliers by marker method, COA wording and sample evidence before price negotiation.

Buyer Review Points

Field	What to Check
Assay model	Confirm whether the offer is based on tea polyphenols, catechins, EGCG or another marker.
Method	Ask whether HPLC, UV or another validated method is used, and keep method language consistent across suppliers.
COA match	Check lot number, marker value, method, specification range, microbiology and contaminant fields.
Application fit	Record color, taste, solubility and finished formula behavior when the extract is used in powder or beverage systems.