Is teeth whitening safe?

I have heard stories on how it is not good for your teeth as whitening them can strip the enamel. I did some searching around on line and most articles I have read said it "is" safe to whiten your teeth as long as it is done with the right amount of carbamide peroxide. Most teeth whitening systems use 10% carbamide peroxide trays and with that amount it is safe and effective. So just make sure you know what your using when you get them done.