My sister in law said something about chemicals in cosmetics the other day, which got me googling. I can't find much authoritative information on how great the dangers of these chemicals really are, but I did find this:
I think yabu, but I am sure there are people who will agree with your worries. My Mum is obsessed with 'chemicals' (ie: artificial chemicals) in cosmetics, etc, yet she smokes 20 a day.
The main ways to help prevent cancer are eating at least 5 fruit and veg a day, not smoking, drinking little alcohol and excercising. Many people I know prefer to focus on the scare stories rather than making lifestyle changes and actually putting some work in by improving their lifestyle. I am not saying this is you though, Sebby! Just an attitude I frequently encounter.
I totally get how you feel, since I fell pregnant (my DD is nearly 5) I've cut out a lot of main stream cosmetics and toileties.
You do have to bear in mind that every ingrediant no matter how natural does have a chemical formual, but I do concenrate on avoiding SLS and other petrochemicals - I just feel that I wouldn't want someone to pour petrol on me, so why would I want something similar?
I also try to eat healthier, and cycle to work (luckily not on busy roads so not inhaling car fumes) Trying to set a good example for DD.