I'm sorry for any confusion, but "Taiwan" is not a medical term or concept. It is the name of an island nation located in East Asia. The official name of the country is the Republic of China (ROC). If you have any medical questions or inquiries, I would be happy to help answer those for you!

"Areca" is the term used to refer to the Areca catechu plant, which is also known as the betel nut palm. The areca nut, which is the seed of the fruit produced by this plant, is commonly chewed with betel leaf for its mild stimulant effects. It contains a number of alkaloids, including arecoline, which has psychoactive properties. Chewing areca nut is a popular habit in many parts of Asia and the Pacific Islands, despite evidence that it can have negative health effects, such as increasing the risk of oral cancer.