Does teeth Whitening work?!

Does teeth Whitening work?

Is there a product in the USA market that can guarantee teeth whitening?

ive been to maxodent website, yet im not sure if they are worth it http://www.teeth-whitening-sales.com/tes...

ive heard of crest white strips. does this work also? btw where is their website?

is there a natural way to whiten your teeth caused by too much drinking of iced tea? If ever i will use maxodent or crest, will this be temporary or permanent?

Does using whitening strips only whiten the front part of the teeth and not the back and side teeth?

is there a permanent way to whiten teeth? Does using any whitening products may damage your teeth?

thanks in advance.

Wow! You've got a lot of questions...

I whiten my teeth using products I get from the dentist. I buy either "NuGold" or "Opalescence." (Around $40 for 3 or 4 syringes/vials)

I tried crest white strips, and then requested a refund as per crest's guarantee. I did not notice any difference at all. But it is supposed to whiten the front and back of your teeth.

As for a homemade solution, mix hydrogen peroxide with baking soda into a paste. Brush your teeth with this (do not swallow). The mixture lasts about a week if you keep it in a tightly sealed container.