Of course it is better to wear eco clothes, eat eco food, drive an eco car, but we live in a real world. It is impossible to do only right things and to choose only "green" products. Nowadays, do not really care what is better, they care only about the price. That's why we can easily find synthetic things in shops, but barely find natural stuff.
However ,we can make a choice between being natural or wear cosmetic. I see no point in wearing make-up. It is supposed to help us being beautiful, but in reality it makes our face worse. Make-up consists only of chemicals, which are bad for our skin. So, if you have some problems with your skin try to use something, that will help to it to go away, not just hide it with cosmetic .
You shouldn't always care about your weigh and become a psyco. But it doesn't mean that you should be fat. In my opinion a person should control his weigh. We all aren't perfect, so not to fat ,not to thin would be the best way out.
In conclusion I'd like to say that the best way out is to find the "golden" middle in everything.