Is teeth whitening good?

hey i am a 17 year old guy. my teeth have yellow stains on it.
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my brother is 18 and has stained teeth also. his dentist said there was no harm in whitening his teeth. i would check with yours also, but i think you would be fine. there is a good write up and info on teeth whitening from http://tips-n-reviews.com/ under health/fitness & beauty, teeth section. from what i understand it is just coloring your teeth so it should be fine
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