Yes it is also believed that estrogen plays a role in behaviour and mental, sexual functions too. The additional estrogen from finestride however can have feminizing effects which in turn is why i would look into cutting it down a little. Not necessary to get rid of it because it is important to the body, but to stop its feminizing effects. The idea is to keep estrogen to normal average male levels, yet stop too much testosterone from becoming DHT.
I was trying to generalise that there are more harmful side effects found in drug induced remedies than natural remedies despite little being known about natural remedies. I dont doubt that your telling the truth, but a lot of my findings are from personal experience aswell as what i have read.
The chemical changes induced from finestride and saw palmetto are indeed similair in the way they interact with the body. However the changes induced by finestride are a lot more potent than saw palmetto which explains why it has more severe side effects and yeilds the greater results.
Why do you think you need a doctor for this type of remedy?
True both type of remedies force the body to adapt to them. The difference lies in the fact in how these remedies force changes in the body and to what extent. I find drugs induced remedies force the greater change in this matter, hence the more severe side effects.
Your right in what you say however about the complete workings of saw palmetto not being fully understood. However there are a good few references to it having potential anti estrogenic effects here just one article
http://vitanetonline.com/forums/1/Thread/32
This mite not be the best example, but i have come across mention of this effect more than a few times. This in fact increases the likellyhood of this being true providing the sources have credibility, which i find do.
Interesting stuff about the psychology of ed and drug interaction by the way. I am sure that will put some peoples minds to rest who are using these remedies.