Green Tea Side Effects - What Substances Are In Green Tea?

By Robert Neely


Talk shows and medical magazines have been advertising green tea extract as a great supplement for fat reduction. With the growing interest of tea, many are concerned about the safeness of the supplement. Many of the press promoting the benefits of tea are not identifying enough of the negative effects. Thoroughly understanding the potential side effects is crucial in order to take health rewards with no damaging outcomes.

Just like many dietary supplements or medicines, the amount has an important role with regards to negative effects. If consumed without care, even the most natural supplement triggers unexpected reactions. Same logic applies here. What exactly is the safe amount of tea?

The most active substances of tea are caffeine and catechin. Both help with using fat as the source to make heat which is known as thermogenesis. This process in return increases metabolic rate. Accelerated metabolism burns body fat much faster in the body.

There have been countless experiments on caffeine and how it affects human body. Many experts are saying in most cases above 500mg of caffeine a day is too much. It could be unsafe causing side effects like insomnia, nervousness, restlessness, irritability, stomach upset, fast heartbeat and muscle tremors. Health experts furthermore agree that level of sensitivity to caffeine varies by an individual, however 300mg or less is regarded a healthy dose.

A single cup of tea possesses about 20mg of caffeine. Compare to coffee, it is a small amount. A single cup of coffee possesses about 100mg of caffeine. If tea is the only caffeinated drink taken then it should not be a concern. But if other caffeinated drinks are consumed throughout the day, then it is critical to check the total daily dosage of caffeine.

Scientists carried out tests regarding dosage. A daily dose of 800mg of EGCG has been successfully tested without any unintended effects. A cup of green tea includes around 100mg of EGCG, so that is 8 cups of tea. A lot of laboratory experiments indicate more EGCG equals to greater weight loss, yet some health experts advise that large dose of one substance from herbs might be problematic. It is not easy to come to an absolute conclusion based on lab reports, still a lot of experts are claiming 300mg of EGCG is a good dosage to consume in a day. There have been successful lab tests with the amount of 300mg versus cancer cells and weight loss.

With the raising curiosity about green tea, even more tests will be conducted. In the meantime, 300mg seems to be a safe dosage for both caffeine and EGCG.




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