Harm from Green Tea

The benefits and harms of green tea

Text: Tatyana Maratova

Photo: TS /

Talking about the benefits of green tea has become a commonplace, and no one disputes the fact that green tea helps some body functions. But does this product have side effects, does green tea harm health, and what kind of harm?

The harm of green tea is insignificant and, as a rule, affects only some groups of people: for example, pregnant women in the late stages, as well as patients after a stroke or heart attack. The harm of green tea for pregnant women

Is green tea, the harm of which seems almost absurd, maybe a dangerous drink for someone? It turns out maybe.

As a rule, there are no harm or side effects from drinking green tea. However, pregnant women are advised to reduce their consumption of green tea during pregnancy, as the chemical compound that is abundant in this product – epigallocatechin gallate – affects the way folic acid is used by the body. And this acid is important for the body of a pregnant woman, since it prevents the development of neural tube defects in the fetus.

The epigallocatechin gallate in green tea is very similar in chemical composition to another element – methotrexate. This compound, in combination with certain enzymes, can help in the destruction of cancer cells and in the conversion of folic acid to its form in which it is absorbed by the body. Due to the fact that gallate of epigallocatechin chemically has a similar structure, it can replace the necessary “correct” enzymes that interact with methotrexate, which ultimately will affect the treatment of folic acid. And this factor must be taken into account when considering the dangers of green tea.

The harm of green tea lies in … caffeine!

Of the other, less serious factors that indicate the dangers of green tea, one can name a large amount of caffeine in some types of this drink, which, by analogy with coffee, can cause insomnia. This side effect, however, has not been conclusively confirmed by medical research. If we talk about pregnant women, as one of the main risk groups, it was found that moderate consumption of caffeine, whether green tea or coffee, in fact does not pose any danger to the expectant mother or to the fetus. The danger comes when a pregnant woman daily consumes several cups of green tea. This can lead to low birth weight, premature birth, and sometimes even fetal death.

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