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According to the U.S. Food & Drug Administration, one eight-ounce cup of green tea contains around 30 to 50 milligrams of caffeine, compared to 80 to 100 milligrams in an eight-ounce cup of coffee ...
Here's everything to know about the caffeine content of green tea. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ways to ...
A standard eight-ounce cup of green tea has about 25 milligrams of caffeine, and the FDA recommends consuming no more than 400 milligrams per day, so just be sure to factor your cup of tea into ...
Preparation and many other factors have a significant impact on tea, and color is a poor indicator of caffeine content. Teas like the pale Japanese green tea, gyokuro, for example, contain far more caffeine than much darker teas like lapsang souchong, which has minimal caffeine content. [243]
Green tea is a type of tea made from the leaves and buds of the Camellia sinensis that have not undergone the withering and oxidation process that creates oolong teas and black teas. [1] Green tea originated in China in the late 1st millennium BC, and since then its production and manufacture has spread to other countries in East Asia.
A study found that the caffeine content of one gram of black tea ranged from 22 to 28 mg, while the caffeine content of one gram of green tea ranged from 11 to 20 mg, reflecting a significant difference. [58] Tea contains small amounts of theobromine and theophylline, which are xanthines and stimulants, similar to caffeine. [59]