NY,
1) My thinking is that Retin-A Micro is a superior product since it doesn't cause peeling or redness, which can make ppl stop using Retin-A. Everyone is entitled to their preference, however.
2) I don't know what chemicals you mean. Could you be specific?
3) Purging happens to some ppl, not all. If you did not purge when you started the Green Cream, chances are you are not one of the purgers. That is OK.
4) I used Green Cream every nite on my skin. Why would you want to complicate things and switch around among products? The trick is to stick to a program and use as few products as possible so you can see what works and what doesn't. You don't need everything all the time! Forget the advertising and stick to the basics.
5) I don't have enough info to comment on nanotechnology, so I am always on the lookout for facts about it, not advertisement. For the time being, I use Viterol A, which has nanotechnology. I only use it around my eyes and mouth not all over my body, so the exposure to it is limited.
I hope this helps you a little. I know you are interested in skincare, and it shows, but try to keep it as simple as possible....life is complicated enough!!