This red residue is the telltale sign of the betel nut, which is chewed by millions of people across the globe. In its most basic form, betel nut is a seed of the Areca catechu, a type of palm tree. It’s commonly chewed after being ground up or sliced and wrapped in leaves of the Piper betle vine that have been coated with lime. This is known as a betel quid. or flavorful spices may also be added.

This red residue is the telltale sign of the betel nut, which is chewed by millions of people across the globe. In its most basic form, betel nut is a seed of the Areca catechu, a type of palm tree. It’s commonly chewed after being ground up or sliced and wrapped in leaves of the Piper betle vine that have been coated with lime. This is known as a betel quid. or flavorful spices may also be added.