The benefits of Green Tea extract may be accompanied by risks if the dosage is too high. Other nutrients must be present at the same time, in order to avoid these risks. In other words, supplements that contain only the tea extracts and nothing else are not your best choice.
The studies concerning the potential toxicity of the catechins found in green tea were conducted in the same manner as those that describe the benefit. It was found that at high doses, the catechins were toxic to liver cells and caused the depletion of glutathione, an important tri-peptide that also acts as an antioxidant.
Judging by all of the research that has been done, it seems that some antioxidants are important to some parts of the body, but not to others. So, there must be a balance. One of the benefits of green tea extract is to protect the stomach, throat and prostrate from cancer. Glutathione, on the other hand, prevents oxidative stress to the heart and the brain. Resveratrol, another antioxidant, protects the cells of the breast, skin, colon and pancreas from free radical damage that can lead to cancer.
Basically, we need all of these antioxidants, if we want to live a long healthy life, but we don want to overdo it. According to respected scientists, to get the benefits of Green Tea extract, with no risk, the daily dosage should be 100mg per day. If you see a supplement that contains more than that, don buy it.
There are, of course, some that advocate mega-doses of vitamins and higher dosages may be appropriate for treating certain diseases, but as a maintenance dose, 100mg per day is perfect. You get the catechins, but not enough to cause damage to the liver or the depletion of glutathione.
Levels of glutathione are known to decrease with age, so supplementation is necessary and important, particularly if you are also taking extracts from green teas. But, until recently, there was a problem. Regular glutathione cannot be used by the cells and is useless if it is released in the stomach, as it would be with normal capsules or tablets. So, you need to look for supplements that contain educed?glutathione of low molecular weight and the tablet should have an enteric coating to prevent stomach acid from making it useless.
If you wanted the benefits of green tea extract, reduced glutathione and resveratrol, as well as the nutrients that your body requires to function on a daily basis, you could buy five or six different bottles or you could look for a multi-nutritional supplement that contains all of these things. I always like to get the best value for my money, so I choose a multi-ingredient supplement and I take an omega3 fish oil supplement, so that all of my bases are covered.
Reference: Why not buy one Chinese Green Tea form Chineseteaart.com? There are many Green Tea for you to choose.
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