People with red teeth in Myanmar are not vampire

In Myanmar, almost everywhere it is very common to see people chewing betel. The simplest way of chewing betel is to chew areca nut wrapped with betel leaf applied with lime. But, nowadays some other optional ingredients, like dill seeds, liquorice, clover and tobacco, are added into betel and betel turns out to be a sort of mild narcotic like cigarettes. Those addicted seriously to betel chew betel all the time while working, walking, driving and even sleeping. Betel can help those driving long on high way road to not be sleepy but to be active. People chew betel and gradually their teeth are stained and become vampire like, though they do not feed on blood.