Be Aware of Side Effects of Drinking Green Tea

Green tea is a popular drink for its health benefits, including weight loss and detoxification properties. However, it is advisable to moderate its consumption. Let us see the side effects of drinking green tea.

Be Aware of Side Effects of Drinking Green Tea

Green tea originates from the mountainous regions of China, Myanmar and Thailand, it is popular for its many therapeutic benefits, including:

  • Prevents cognitive impairment
  • Reduces cholesterol
  • Reduces hypertension
  • Prevents certain cancers
  • Promotes weight loss
  • Detoxifies the body
  • Stimulates blood circulation

Green tea

Green tea contains many beneficial substances for the body. Indeed, it is rich in antioxidants including catechins (up 30%) and epigallocatechin-3-gallate (EGCG) (up 75%). Tea also contains caffeine and theanine. The latter substance has, according to scientists, a stimulating effect on the immune system and relaxing effect over nervous system. Here are some benefits of this drink related to certain conditions:

Heart attack

According researchers of the University of Maryland Medical Center, consumption of 3 cups of green tea per day would help reduce the risk of heart attack by 11%.


The green tea antioxidant content would help to prevent the onset but also stop the growth of cancer cells. In fact, tea contains antioxidants called catechins, epigallocatechin -3-gallate (EGCG) and theanine which have anti-cancer properties by inhibiting cancer cell proliferation.


The green tea antioxidant content helps to clean the blood vessels and prevent the accumulation of fat in the walls. An epidemiological study has shown that people who regularly drank tea had lower levels of bad cholesterol than those who do not drink it.

Weight loss

It is well known that green tea is an effective slimming ally. Researchers from Pennsylvania University have tried to prove that. They carried out their research on mice suffering from obesity. To make them lose weight, researchers applied sport and regular green tea consumption. After 16 weeks, scientists have noted a decrease in abdominal fat of 27.1% and a body fat decrease of 36.6%. However, it is important to combine exercise and a balanced diet for lasting and effective results.

Side effects of green tea consumption

It is well known, that there also side effects from green tea consumption. It is therefore advisable to drink maximum 3 cups of green tea a day, after or before your meal (2.5 g tea leaves in a cup of warm water, or 250 ml). However, if you exceed this average, you may cause certain disorders like:

  • Headaches
  • Stomach pain
  • Excessive shaking
  • Nausea
  • Loss of appetite
  • Iron deficiency
  • Tremors
  • Nervousness
  • Insomnia
  • Irregular heartbeat
  • Affect the level of sugar in the blood (for diabetics)

In addition, green tea is also not recommended to many people who suffer from certain disorders. For example, for people who suffer from liver problems, those with dark colored urine or chronic abdominal pain are advised to seek advice from their doctor before drinking green tea. In addition, it is also recommended for pregnant women, nursing mothers, people who suffer from iron deficiency or who are undergoing chemotherapy to seek advice from a specialist before green tea consumption. Finally, green tea is not recommended for people with hypertension.

Organic tea

Besides the moderate consumption, it is also important to consume organic tea. Tea you can find in the supermarket may contain high pesticide content. These are chemicals used to neutralize insects and fungi. Laboratory tests have reported that this ingredient hides other substances such as:

  • Biocides, substances that can be found in the water disinfectants, antiparasitics or antibiotics.
  • Herbicides, products used to remove weeds.
  • Mineral oils, in recycled paper.

Furthermore, Canadian researchers from the University of Alberta have discovered that green tea possess high concentration of heavy metals such as aluminum, lead or arsenic. According to scientists, the concentrations of these metals rise even more when tea is brewed. Therefore, it is advisable to buy organic tea that you can find in specialized stores.

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