How Much Caffeine In Tea?


The amount of caffeine in tea depends on a number of factors, including:

• Region where the tea was grown

• Age and variety of the tea plant

• Length of the growing season

• Field and soil characteristics

• Amount of sun, water and nutrients

• Method used in processing the leaves

How the tea is made has a major impact on the amount of caffeine that ends up in your cup. The amount of tea used, water temperature, steep time, and whether one brews loose leaves or a tea bag, all influence caffeine levels.

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Rule of thumb: The more tea is being used, the longer the brewing time and the hotter the water — the more caffeine will be extracted.

Given there are so many factors at play, the amount of caffeine in a single cup can vary greatly:

Tea Type          Caffeine Per Cup (8 oz)

White                 30-55 mg

Green                35-70 mg

Oolong              50-75 mg

Black                 60-90 mg

For comparison sake: a cup of coffee contains 150-200 mg of caffeine, while cola about 40 mg.

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