Tea extracts polyphenols is a natural plant compound in Tea.Its main part 65%~80% is Catechins. Catechins includes EGCG and others.Tea polyphenols,Catechins and EGCG are 3 key parameters of tea extracts COA.
Tea is good for people’s health. There are many types, such as green tea, white tea, black tea,etc. Factory produce tea extract to make use of its benefits.
How to evaluate the tea extracts quality? By checking COA.
What’s the key parameters? There are three items: tea polyphenols, Catechins,Epigallocatechin gallate(EGCG).
What is tea extracts polyphenols?
Polyphenols is a natural plant compounds which are found in Tea.It can affect the flavor and mouth-feel. It provides potential health benefits.
Green tea polyphenols include but not limited to Catechins, EGCG, epigallocatechin, kaempferol, epicatechin, quercetin..et
What’s the relationship of tea extracts polyphenols, catechins and EGCG?
Polyphenols includes with Catechins and other parts. Catechins is what make tea special. They make up the bulk of tea’s antioxidants and its healing potential.
Catechins include EGCG, epicatechin, epicatechin-3-gallate, epigallocatechin, catechin, and gallocatechin.About half of the catechin content of tea is EGCG. EGCG is the focus of almost every scientific study. It has been associated with most of the newly discovered tea benefits.
Why the assay of this 3 items should be indicated in COA of tea extract?
Catechins constitute about 65%-80% of tea extract Polyphenols. EGCG constitute about 50%-60% of Catechins. EGCG is the main subject of scientific study with regard to the potential health benefits.
So, the level of EGCG in tea extracts is related to the bioactivities. This is the reason why EGCG have to been indicated the assay in COA, as well as the assay of Catechins.
Written by Amy Yang
Amy specializes in botanical industry.
With 8+ year’s experience of global sourcing and supply chain management, she got knowledge of herbal extracts, inspection skills, GMP and suppliers management.
Amy is constantly sharing her knowledge by posts.
She always expects to receive feedback from you.