It seems not much research is done on plant extracts.Maybe this is because there are so many ingredients, over 4000 phenolics alone and its hard to patent anything."
Actually there is a lot of work done on plant extracts. I goes something like this. You take a crude extract from about 1,000 plants. Then dump the extract on cancer cells, bacteria or whatever. If it kills the bad cells then all you have to do is find out what ONE of the 10,000 chemicals in the extract was the one that did the work. Very easy you see.