01
EGCG percentage defines the grade
Green tea extract is usually specified by total polyphenols and EGCG content; confirm both values and the test method before quoting.
02
Caffeine control matters by application
Low-caffeine and decaffeinated options exist for sensitive formulations; state the target up front so the route matches the end use.
03
Food and cosmetic grades have different checks
Application drives heavy metal, microbiology and solvent residue scope; align documents to the intended market and product type.