Is bleaching your teeth bad for them?

If so, how???

I'm thinking about going to the dentist and getting it done but my family kept saying its bad.

I think its okay to trust your dentist with it - but there have been reported problems with some of the over the counter stuff.

Researched it - didn't see an indication it was bad for you - some info:

Despite all of the hype you might have heard or read, a motivated patient can achieve the same end result (the same degree of whitening) with a tray-based teeth whitening process as they can with any other peroxide-based methodology (including in-office teeth whitening treatments performed by their dentist). This is because whitening teeth with peroxide is simply a function of the cumulative exposure of the person's teeth to the whitener. Using a low concentration peroxide over a series of individual treatments (tray-based teeth whitening protocol) or a much higher concentration of peroxide over a much shorter time frame (in-office whitening treatments) can both be expected to produce the same result (if the teeth are given a similar cumulative exposure to the peroxide).

I don't think a dentist is going to do something that damages your teeth. Now if you were trying to do something without the supervision of your dentist I could understand your family having a problem with it.

Well you know, not everything that LOOKS nice is good for you. I heard it weakens your teeth. Well thats what everyone around me is thinking!!!

I am not sure ... but I THINK (not sure ) it can cause your enamle to wear out quicker

Laser whitening is safer, bleaching can weaken your tooth enamel.