The buds and young leaves make the choicest teas. Black Tea is made by sweating, fermenting and firing the leaves. In the process of fermentation, much of the tannin is destroyed. Black tea comes chiefly from India, Ceylon, Java and China. Green Tea is prepared simply by drying and firing the leaves so that its tannin content is materially higher than black tea.
Green tea comes chiefly from China and Japan.
Oolong Tea is made by an intermediate process which partially destroys tannin. Oolong Tea comes from China and Formosa. Cocoa and chocolate are made from the seed of the cocoa bean. Like coffee the beans are roasted to develop flavor, after which the outer covering is removed and sold as cocoa shells. They have little or no nutritive value.