Is there a research about the possibility of green tea or black tea acting as dht or dihytestosterone blockers?

Limited research: The best study i found was a study on mice showing black tea reduced DHT levels by 72% while green tea increased DHT by 194%. I'm not sure why there would be such a large difference between the 2 as they are the same plant in different forms- see http://jn.Nutrition.Org/content/133/2/516.Full#sec2 I found several sites claiming green tea reduces DHT but it was based on this same study!see comment:.