These are simple methods for teeth whitening.

As a few whitening teeth with paste, or in a doctors, but at home are these methods also having?
Why my teeth are dark.
Enamel is half transparent, and does not influence on a teeth color, as shadow depends from dentin, which transparent though enamel, as thin enamel is strong, but very simple damaging as through his penetrating colored are of caffeine, juices, red wine, cola, tobacco, as in dentin deeply entering, coloring in yellow and dark shadows, as with ages enamel in thin and darken looking, but on a color influencing and bad care for teeth, injuries, nerves removed, used antibiotics, metabolism bad, thyroid diseases, digestive diseases, but a healthy and calcium enamel is yellow color, as to any whitening is thin enamel, sensitiveness, therefore care for mouth cavity, fight caries, timely teeth cure. Yes you can to white teeth, for a few shadows, as at home, but just less doing , as theirs damaging enamel, causing inflammation for mouth cavity.