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Green tea: contraindications


Side effects of green tea
Green tea, despite being tremendously healthy, has some contraindications, like other teas. It contains caffeine, so hypertensive and pregnant women should not consume it. Also, it would hinder the absorption of iron in foods and contains some amounts of fluoride.

Green tea, in addition to its excellent properties, has its contraindications related to its high content of caffeine, more precisely of theine, and the large amount of tannins it contains.

Therefore, if you want to take advantage of its benefits, it is very important that you bear in mind what side effects it can cause and in what situations and for what diseases it is contraindicated.

What are the side effects and contraindications of green tea?
It is not recommended in cases of hypertension. Green tea, like any other tea from the Camellia Sinensis plant, contains caffeine (although at lower levels than others in its class). For this same reason, those who suffer from hypertension should avoid it. For this reason, it is not recommended for children.
A moderate amount of caffeine is less than 200 milligrams a day, less than 5 cups of tea. Too much caffeine can cause the following side effects:

  • Headache
  • Nervousness
  • Problems in sleep
  • Vomiting
  • Diarrhea
  • Irritability
  • Irregular heartbeat
  • Tremors
  • Heartburn
  • Dizziness
  • Ringing in the ears
  • Seizures
  • Confusion

It should not be consumed during pregnancy and lactation. For the same reason, previously mentioned, green tea is not recommended for pregnant women. According to a study, it can affect the nervous system of babies.

It can cause upset stomach and constipation. In fact, in Japan and China it is common knowledge that one should not drink green tea on an empty stomach. The tannins in green tea increase stomach acid. Therefore, if you drink green tea before eating, it can cause stomach pain, nausea or constipation.

It is best to drink green tea after a meal or between meals. People with peptic ulcers or acid reflux should take special care.

It interferes with the absorption of iron. Tea consumption is not recommended half an hour before or half an hour after meals, as it is believed that hinders the absorption of iron from food.

If you have iron deficiency anemia, the National Cancer Institute recommends consuming tea between meals. If you like to drink green tea with food, then studies show that you should eat foods that improve iron absorption.

Iron-rich foods are meats, such as red meat and foods high in vitamin C, such as lemons.

In large quantities it could cause cancer. Green tea, like other varieties, contains fluoride, a substance that, in high proportions, is considered carcinogenic. It is important to clarify that this contraindication is not 100% proven and that there are studies that support the opposite.

Interacts with other medications. If you are taking medications prescribed by your doctor, you should check to make sure there are no harmful interactions with Organic Bai Hao (White Downy) Green Tea.

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