Betel nut is generally not recommended to eat too much, usually 1-2 per day can be, should not exceed 3-5 to avoid adverse reactions. Betel nut contains nutrients and organic substances required by the human body, and also contains a variety of active ingredients in medicine, mainly including alkaloids and catechins, choline, etc., has the effect of eliminating food, Qi, and dampness. However, betel nut should not be eaten too much, too much long-term eating has certain side effects. According to medical statistics, there is a close correlation between betel nut chewing and oral cancer, and people who chew betel nut are about 20 times more likely to develop oral cancer than the average person. Generally speaking, betel nut should be eaten 1-2 pieces a day, and not more than 3-5 pieces at most to avoid cavity and tongue discomfort or even paralysis. Betel nut contains a lot of caffeine and nicotine, so for most people, long-term consumption of betel nut is not recommended.