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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.
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]
Tea (left) and coffee, the two most common naturally caffeinated drinks. A caffeinated drink, or caffeinated beverage, is a drink that contains caffeine, a stimulant that is legal practically all over the world. Some are naturally caffeinated while others have caffeine added as an ingredient.
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 ...
If to sip a cup of tea to relax before bed, look for teas that are clearly labeled "caffeine-free" on the front of the pack, or check Nutrition Facts labels closely for 0 mg caffeine per serving.
Specifically, coffee drinkers had the lowest risk—nearly 50% reduction in risk—while people who consumed 200 to 300 mg of caffeine from tea or a mix of both beverages were about 40% less ...