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

By Robert Neely


Health TV shows and magazines have been advertising green tea extract as an effective supplement for weight loss. With the increasing interest of tea, many are concerned about the safeness of the supplement. A majority of the media promoting the benefits of tea are usually not explaining enough of the side effects. Thoroughly knowing the potential negative effects is important to be able to take benefits without having harmful results.

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?

An active ingredients of tea are caffeine and catechin. Both help with utilizing body fat as the source to produce energy which is known as thermogenesis. This process in return enhances metabolic rate. Increased metabolic process burns fat more rapidly in the human body.

Many analyses on caffeine and its effect on human body have been carried out. Many experts are claiming in general above 500mg of caffeine in a day is too much. It can be harmful resulting in side effects which include insomnia, nervousness, restlessness, irritability, stomach upset, fast heartbeat and muscle tremors. Health specialists furthermore agree that sensitivity to caffeine ranges by an individual, however 300mg or below is regarded as a good amount.

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.

Researchers carried out laboratory tests regarding dosage. A daily dosage of 800mg of EGCG has been tested successfully and with no uncomfortable side effects. A cup of green tea has about 100mg of EGCG, which is about 8 cups of green tea. A lot of laboratory tests suggest more EGCG means greater fat burning, however some health professionals agree that an excessive amount of one ingredient from herbs could be problematic. It is not easy to make an absolute conclusion based on lab studies, still numerous health experts are claiming 300mg of EGCG is an ideal dosage to take in a day. There have been good clinical outcomes with the amount of 300mg against cancer cells and weight loss.

Due to the growing interest in green tea, even more laboratory tests will be conducted. For now, 300mg seems to be a safe dosage for both caffeine and EGCG.




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