Green tea is packed with catechin polyphenols whose antioxidant activity has several positive health implications. However this doesn’t mean that you should be chugging cup after cup of that delicious matcha. Green tea, essentially, is a stimulant and thus excessive consumption can prove to be harmful to your health.

Drinking 3-5 cups of green tea in a day is considered to be the right dosage to get its optimal health benefits. If you drink 3 to 5 cups (approx. 1200ml) of green tea daily, then you are getting around 250mg of catechins.[1]

Dose instructions are usually given on the green tea package. You can follow the given instructions or consult a nutritionist or a physician. If dose recommendations are clearly given for the product, then make sure do not exceed those limits.

Avoid using multiple green tea products (such as pills, capsules, extracts, oil etc.) at the same time as it increases the possibility of complications by overdose.

How Much is Too Much?

The catechin and caffeine content in green tea is attributed to its weight loss benefits. However, it is also important to know that drinking excessive amount of green tea will not help you lose weight. On the contrary, it does more harm than it helps.

Too much caffeine consumption can cause mild to severe symptoms of following:

  • Nausea
  • Increased heartbeat
  • Restlessness
  • Insomnia
  • Sweating
  • Vomiting

Green teas contain varying concentrations of caffeine. So, the occurrence of these symptoms depend upon the type of green tea you are drinking.

Too Much EGCG?

Green tea contains EGCG, a polyphenol

A regular cup of green tea contains around 180 mg of Epigallocatechin gallate or EGCG, the most potent green tea catechin. The health benefits of EGCG have been implicated in a plethora of scientific researches. Most notably, EGCG has been attributed to weight loss by the mechanism of fat oxidation, increase in thermogenic activity and improved metabolism.

It is easy to see why people might try to drink more cups of green tea or take excessive green tea supplements to speed up the weight loss.

When taken in appropriate amounts, EGCG does not pose a significant risk to your health. But if you exceed the limit, EGCG can act as a pro-oxidant and may cause damage to liver cells.[2]

Other Concerns Regarding Green Tea

Green tea is safe and is given GRAS (Generally Recognized As SAFE) status. However, green tea may cause side effects in some cases. 

Don’t drink excessive green tea or avoid drinking altogether on an empty stomach. The tannins found in green tea might cause you to have an upset stomach.

If you’re pregnant, then you might want to limit your green tea to 2 -3 cups a day. The caffeine content in green tea may pose a danger when you’re expecting. It is advised that you consult your doctor first before drinking green tea if you’re pregnant.



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