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Black tea, made from leaves which have been allowed to ferment before curing.

Green tea, made from unfermented leaves artificially colored.

The best black tea comes from India and Ceylon. Some familiar brands are Oolong, Formosa, English Breakfast, Orange Pekoe, and Flowery Pekoe. The last two named, often employed at the “five o’clock tea,” command high prices; they are made from the youngest leaves. Orange Pekoe is scented with orange leaves. The best green tea comes from Japan. Some familiar brands are Hyson, Japan, and Gunpowder.

From analysis, it has been found that tea is rich in proteid, but taken as an infusion acts as a stimulant rather than as a nutrient. The nutriment is gained from sugar and milk served with it. The stimulating property of tea is due to the alkaloid, theine, together with an essential oil; it contains an astringent, tannin. Black tea contains less theine, essential oil, and tannin than green tea. The tannic acid, developed from the tannin by infusion, injures the coating of the stomach.