T.P.
I vote for Pur Minerals because it has no chemicals. Why is this important? Because your skin is like a big sponge and almost everything you put on it goes right into your body. -To the detriment of your health.
Your body doesn't known what to do with these chemicals, so store much of them in body fat, marking storage cells as 'bad' and making it 1) easier to gain weight, and 2)harder to lose it.
Over time your body stores up so much chemicals yet it still has to handle more daily, placing your body in chemical overload. The symptoms of chemical overload can be as mild as immunity deficiencies (get sick a lot) to severe much like lupus symptoms (severe fatigue etc), or any point between.
Burts Bees has some great information on chemicals on their website.
You're already doing something good for your body; don't change it.