The Student Room Group
Reply 1
http://www.thestudentroom.co.uk/showthread.php?t=193692

lots of info on why you shouldn't go near any DIY kits or "whitening" toothpastes
You don't need white teeth. Unless they look like you have a mouth full of mud I wouldn't worry.
Reply 3
For white teeth, ask your dentist.
Reply 4
Your dentist SHOULD polish your teeth if your under 18.
Reply 5
Maybe you should bleach your teeth at the dentist anyway. It might seem more expensive but it lasts so much longer it's really not.