In fact, betel nut is very harmful to teeth, and it may cause oral cancer seriously. Most patients with oral cancer have the habit of chewing betel nut, which shows that betel nut is the main cause of this disease. Therefore, when you are in eat areca, you should be moderate and eat less. For those who are not addicted, it is best not to eat any more. For those who are already addicted, you should start to quit slowly, replace betel nut with other foods, such as chewing gum, and gradually stop eating. Therefore, for the question of how much to eat a day is more appropriate, we can only say that it is best not to eat.