Japanese green tea is said to have a lot of catechin, which has the effect of killing bacteria. Some schools especially at the tea-production areas encourage their students to gargle with tea during winter. Between classes, after PE class, before school lunch…..the all students gurgle with tea. According to those schools, fewer students catch a cold since they have introduced this system.
Coarse tea has more catechin than high-quality tea. Even tasteless tea made from used tea leaves has enough catechin to work for killing bacteria. Tea is not only for drinking, is it?
