What supplements can I take to whiten my tea-stained teeth?

Hydrogen Peroxide. There are no pills/vitamins/supplements that can change teeth color due to any cause, including tea. Tea is the #1 cause of stain. Brush with whitening toothpaste twice daily. After, get otc 3% hydrogen peroxide (active ingredient for all teeth whitening agents). Mix 1 part hydrogen peroxide to 2 parts water. Rinse twice daily. Safe to use consistently. Electric toothbrushes are better than manual.
None. Have your teeth professionally cleaned to remove the surface stain.

Related Questions

How to whiten the tea-stained teeth?

Discoloration. Tea stained teeth are temporary discoloration that can be taken cared of by the dentist. Unlike staining caused by some drugs like tetracycline among young kids which are permanent.
Electric toothbrush. Very effective way to clean stains because it does a better job of cleaning off plaque/tartar than a manual toothbrush. Rinse mouth w water after drinking tea. Brush/floss daily to remove plaque build up between teeth staining the edges. Old - fashioned baking soda/salt made into paste, brush it on teeth twice weekly, can remove stains. Use whitening toothpaste.
Professional whiteni. You will probably need professional teeth whitenings, may take few sessions together with at home teeth whitening.

What is the quickest way to get rid of stained teeth at home? I don't have the money to go to the office and have my teethwhitened. What is the fastest way to get them whitened at home and how long will it take?

There. There are a number of different otc whitening kits you can buy at your pharmacy. They may not work as well or as quickly as a professionally applied gel, but they may get your teeth white enough to make you happy. The amount of time it will take depends on how dark or stained your teeth are. If they are very dark or stained, the otc gel may not be strong enough to do the trick.
Crest Whitening. Crest whitening strip are the cheapest way to get an effective whitening. It may take up to 2 weeks.
Crest Strips. The cheapest, quickest and most effective home whitening can be purchased in your local pharmacy. Crest whitening strips work and have good results.
White strips. White strips are effective. How long it takes depends on how dark your teeth are and how white you want them to be. If your teeth are just a little yellow or yellow-brown they will work wearing them every day for about two weeks. If your teeth have a grey discoloration they probably won't work.