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Green Tea Extract

Active Components and Constitutional Formula 

The cardinal antioxidative ingredient in the green tea extract is green tea catechins (GTC), which comprise four major epicatechin derivatives; namely, epicatechin (EC), epigallocatechin (EGC), epicatechin gallate (ECG), and epigallocatechin gallate (EGCG).

Other components include three kinds of flavonoids, known as kaempferol, quercetin, and myricetin.



epigallocatechin gallate



Total Tea Polyphenols: 60-98%

Total Catechins: 50-80%


Caffeine: NMT 0.5%,2%,8% 


Certificate of Analysis




Yellow Brown Powder

Total Tea Polyphenols

60-98%, UV-VIS

Total Catechins,

50-80%, HPLC
















Caffeine, %


Loss on Drying

≤5.0%, 5g / 105 / 2hrs

Particle Size

100%Through 80 mesh


≤2.0%, 2g / 525 / 2hrs

Solvent Residue

Eur.Pharm 2000, Gas Chromatography

Total Heavy Metals

≤10ppm, Atomic Absorption


≤2ppm, Atomic Absorption


≤1.0ppm, Atomic Absorption

Total Plate Count


Total Yeast & Mold







E-mail us to get quotation and typical certification of analysis


Indications and Usage 

Green tea extracts are herbal derivatives from green tea leaves (Camellia sinensis). Containing antioxidant ingredients – mainly green tea catechins (GTC) .  


The biochemical properties of green tea extracts can be generally divided into four aspects – antioxidant, anticarcinogen, anti-inflammatory, and anti-radiation .


Green tea extracts exhibit stronger antioxidant protection for human body than vitamin C and vitamin E. Scavenging effect of lipid free-radicals (one antioxidant property) of polyphenols in green tea extracts can be clearly observed in experiments. The ability of GTP in green tea extracts to eliminate lipid-derived free radicals is noticeably stronger (almost 50 times) than that of ginkgo biloba extracts. Further investigations indicate that the boosting level of superoxide dismutase (SOD) and glutathione dismutase (GSHPx) may account for the inhibitory effect of GTC against lipid oxidation (rancidification) [2]. It should be mentioned that from the antioxidant perspective, green tea extracts are, generally speaking, more effective than black tea extracts due to the better preservation of catechins.


Moreover, the anticarcinogenic property make the green tea extracts a hotspot in recent scientific researches. In many experiments, green tea extracts show inhibitory effects on cancer cells. In vitro assays, Catechin and caffeine, which are main components in green tea extracts, block the cell cycle of cancer cells (cytotoxicity) and induce programmed cell death; in vivo, green tea extracts also inhibits prostatic carcinoma transplanted in nude mice.


In addition, green tea extracts also contain a wide-ranged anti-inflammatorycharacteristics, so it may be helpful in treating chronic inflammatory states. The bactericidal activity against S.mutans is conspicuous in Japanese green tea extracts, and the maltose level in mouth is consistently lower after drinking tea. Therefore, green tea extracts may be effective in oral hygiene maintenance.


Green tea extracts show anti-radiation property on white rats in radioactive isotope experiments. 


For a green tea extract standardized for 80 percent polyphenols and 55 percent EGCG, a daily dose of 300 to 400 mg green tea extracts is recommended. Some green tea extracts may have as little as 15 percent polyphenols, usually these are far less expensive. It should be kept in mind that the various components of unpurified green tea extracts have synergistic effects and therefore are better than any individual tea component . Scientists also conclude that tea extracts are better taken between meals in order to avoid decreased iron absorption.

Though green tea extracts show potential anticancer capacity - under some conditions by working together with other drugs and suppressing multidrug resistance in cancer cells - they are not suggested for use alone as a chemotherapy agent for cancer treatment .


Excessive intake of green tea extracts containing caffeine has side effects an excessive concentration may act as a pro-oxidant to damage DNA 



25kg/drum, double layers plastic bags inside.


Storage Situation

Stored in a cool and dry well-closed container. Keep away from moisture and strong light/heat.

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