The caffeine material content in black tea is dependent on the black tea maker, the black tea’s method of production, and how black tea was withered, fermented, and stored. Black teas are often oxidized (a kind of fermentation) to convert their polyphenol contents into black tea polyphenols. The black tea polyphenols in black tea are the result of the same organic chemical reactions that black tea fermented black teas have with oxygen-rich air during their processing. However, more oxidized black teas contain more caffeine than less oxidized ones.
Black tea caffeine content is typically around 1.3% of its dry weight or about 77 milligrams of caffeine for every 3 grams black tea.
How much caffeine does black tea have compared to coffee?
Black teas have slightly more caffeine than an average cup of coffee. But green tea has about half as much caffeine content as an average cup of coffee.
Caffeine amounts in different types of tea (per 100 ml)
Type/Tea Caffe Amount
Oolong Tea 52mg
White Tea 35mg
Green Tea 27mg
Matcha green tea 21mg
Why does black tea have more caffeine than green tea?
Black Tea has more caffeine than green tea because it is made from the leaves of the plant Camellia Sinensis. Green tea is made out of steamed and dried leaves of said plant. These processing steps reduce caffeine in green teas. Black teas, on the other hand, are oxidized making them much darker and giving them a much stronger flavor.
What are the side effects of caffeine?
Caffeine is known to cause sleep problems, headaches, upset stomach, increased heart rate and blood pressure, anxiety, tremors, and jitteriness. Death can result if an individual has 5–10 grams of caffeine at one time. However, death resulting from caffeine overdose is difficult to accomplish unless a large number of caffeine pills are taken at one time.
How much caffeine is in coffee?
It varies from 80–150 milligrams per 16 ounces of coffee.
What foods have caffeine?
Besides coffee and tea, caffeine can be found in cocoa beans, guarana berries, yerba mate leaves, kola nuts, and the seeds of an Asian fruit called Cola acuminata.