Does green tea dieting have any side effects?

It has been said the green tea increases health benefits but scientific proof of its health benefits are still mixed. In an article in the Archives of Internal Medicine, American researchers collaborated with their Chinese counterparts to discuss the good effects of green tea on cholesterol levels.
There was a recent case study completed where 200 men and women with an average age of 55. All participants have mild to moderately high levels of Cholesterol. When the study began, researchers told them to not change anything in their daily routines. Eat the same, walk the same etc. After 12 weeks the researches concluded that out of the 200 people who participated in this case study, the ones who were chosen to consume Green Tea has lost 15% of there cholesterol levels.
Earlier studies have proven that certain elements found in green tea play a vital role in reducing cholesterol that is absorbed by the body. Researchers are yet to explain how exactly green tea or consuming green tea can reduce your cholesterol levels but it has been made very clear that a green tea diet will reduce your cholesterol levels.
Once again, after further testing was done on the first group of participants researchers are stating that the green tea diet had no effect on cholesterol levels, that the participants using green tea lost cholesterol some other way.
Here is an example of a perfect situation where something that is organic does not get the support of the medical community, which to me is a complete load of ....
A few years back my oldest got the worse case of chicken pox known to man. He got in everywhere and there was not a single square inch of him that didn't have a pox on it. W ended up taking him to the hospital 3 times to try and get him something to help with his pain but the doctors kept saying, there was nothing they could do. Basically, let him suffer until it passes.
I was extremely frustrated with this situation so I decided I was going to try some extract from an Aloe Vera Plant. Funny thing was, once I applied it to my son. His itching stopped with in 15 minuets, two days later, he started to clear up.
When my youngest got the chicken pox one of the same nurses that told us there was nothing we could do for our oldest boy admitted to us that she knew that the Aloe Vera plant would work to stop the itching. I asked her why no one told us about it and why my son had to suffer for a week. The nurse told us that they are no allowed to recommend anything organic. So if you know a kid is suffering, you don't say anything??
Even though there is tons of evidence supporting major success with dieters using green tea to help them lose weight my guess is if it is not made by a pharmaceutical company doctors can not support it, right?