How to get a white teeth is the wish of many people, especially girls, and there are a lot of girls who search online for information on how to whiten teeth and teeth whitening tips, and then try the effect at home themselves. The beautiful girls should not follow those so-called tips without thinking, do not go into the wrong area. A very popular method of whitening teeth on the Internet, said the mouth containing a mouthful of vinegar 2 to 3 minutes after spitting out, and then hurry to brush your teeth, so that the effect of removing tooth stains is more obvious. Many friends read it and try it privately, and found that the effect is actually visible, so it is a hundred to a thousand, more and more people began to use this “magic trick”. I did not know that the teeth white at the same time the danger is slowly approaching. The practice of brushing your teeth after containing vinegar to remove stains is very dangerous. There is an experiment: put the raw egg into vinegar for one night, and then observe the next day, you will find that the egg shell has become soft. The original vinegar has the acetic acid can dissolve calcium, and the tooth surface enamel is composed of calcium, containing vinegar enamel becomes very “fragile”, as long as the toothbrush gently rub, the hard enamel will become a lot of holes. The next result should be understood. We use the so-called trick really white teeth, but back to a fragile teeth, may one day when eating something will feel a “creak”, the big teeth shattered half off, and then not more than forty years old teeth did not go, think about how horrible this is. So, here is a reminder that when you are looking for ways to whiten your teeth, you should be a little skeptical, don’t go into the wrong place blindly and regret for life!