Green tea facts - discover the advantages of green tea

Green tea facts - discover the advantages of green tea

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How about some green tea facts?

Tea is the most popular drink after water. People all over the world consume it. So, what are the advantages of green tea? And, what are the nutrition facts?

How much caffeine is there in green tea?

Green tea is low in caffeine. It has an average of 15 – 25 mg of caffeine (per gram of tea).

To compare, black tea contains 40 – 70 mg of caffeine. A tall cafe latte (354 ml) from Starbucks has 75 mg of caffeine. A tall Starbucks brewed coffee has 260 mg of caffeine. And, a can of Coca-Cola (354 ml) has 32 mg of caffeine.

Which tea has the most catechins?

Green tea has a high amount of the catechin epigallocatechin gallate (EGCG). It has 2 – 3 times more than black tea. Green tea has an average of 80 mg of EGCG (studies vary from 2.31 mg – 203.20 mg) for every gram of tea.

Decaf green tea only has about 26 mg of EGCG. Black tea has about 9 mg. And Oolong tea has around 35 mg.

Generally, bottled tea has a lower amount of catechins than brewed tea.

Are green tea bags the same as brewed tea?

Some green tea bags contain around half the amount of EGCG as loose leaf green tea. However, hotter water and a longer brewing time can increase the level of EGCG.

It is better to use triangular or pyramid-shaped teabags that are large enough to hold larger tea leaves. Using these tea bags has almost the same benefits as regular loose leaf tea.

Why do I feel relaxed when I drink green tea?

The catechins and L-Theanine (γ-glutamylethylamide) promote the feeling of relaxation. The catechins affect the central nervous system and allow the body to calm down.

L-Theanine is an amino acid that is found in green tea and black tea. L-Theanine has been shown to reduce stress and offset the effects of caffeine. Read more green tea facts about hypertension.

Is green tea good for your skin?

Yes. Scientists have discovered that green tea has anti-cancer, anti-oxidant, anti-microbial, and anti-inflammatory properties.

Topical green tea might be able to protect the epidermis. EGCG, the key ingredient in green tea, promotes cell differentiation, which repairs the skin.

Most of the research has involved fresh green tea opposed to commercial premade products. So, some products on the market may not contain the full benefits of green tea because of oxidation.

Research is currently being done on lipid-soluble tea polyphenols, which prevent the green tea from oxidizing and have similar results as fresh green tea. Read more green tea facts about skin care.

Can I drink too much green tea?

It is possible to drink too much green tea if you are sensitive to caffeine or have anemia.

Pregnant and breast-feeding women should drink no more than 1–2 8 oz glasses a day.

Green tea catechins can cause a decrease in the absorption of iron from food. If you have low iron, it is best to add lemon to your green tea to increase iron absorption, or consume tea between meals. Read more green tea facts about side effects.


Cabrera, C., Artacho, R., & Giménez, R. (2006). Beneficial effects of green tea – A review.Journal of the American College of Nutrition, 25(2), 79-99.

Cooper, R., Morré, D., & Morré, D. (2005). Medicinal benefits of green tea: Part I. Review of noncancer health benefits. Journal Of Alternative & Complementary Medicine11(3), 521-528.

Jamieson, M., & McKinley, H. (2009). Handbook of Green Tea and Health Research. Nova Science Publishers.

USDA Database for the Flavonoid Content of Selected Foods, Release 2.1. (2007). Retrieved from

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