Areca catechu
The areca nut is also popular for chewing throughout some Asian countries, such as China, Taiwan, Vietnam, the Philippines, Malaysia, Myanmar, and India and the Pacific Islands, notably Papua New Guinea, where it is very popular. Chewing areca nut is quite popular among working classes in Taiwan. The nut itself can be addictive and has direct link to oral cancers. Areca nuts in Taiwan will usually contain artificial additives such as limestone powder. The extract of "Areca catechu" may be addictive.