Thanks for a though review of the topic - straight to the point and informative!
The thing I admire the most is that you are very balanced in your review, analyzing the facts without being biased - you do not hurry to condemn added materials as bad just because they are not natural and that's really fair of you.
It's really frustrating that they just state chemical names that no one other than an organic chemist would understand - it would have been so useful to have a site where every chemical and additive is explained i simple words with it's potential dangers and benefits, just like there is a n index for carcinogenic materials. do you know of such index?

I still do wonder on the ecological cost of producing those ingredients, even if they are not harming us directly, the process of producing them might be harmful to the environment and eventually to us - it would be lovely of you could add some details about that aspect in your next article :)