How do caffeine in tea and coffee differ?

Originally called "theine", caffeine was first discovered in tea in 1827. It was later shown that the "theine" of tea was identical with the caffeine of coffee, and the term "theine" was then dropped. While the caffeine in tea and coffee are, technically, identical, the experience is different due to three key factors: 1. read more

Most people have never tried to actually measure the caffeine in tea or coffee, and get themselves into all sort of trouble with pseudoscientific hokum. The caffeine in tea and coffee is absolutely chemically identical in every way, and any difference is due to the concentration, not the chemical character. read more

Caffeine content in a cup of coffee is very high, and depending upon the kind of coffee you use, you could have 80-135mg of caffeine with every cup of coffee. Caffeine in coffee stimulates a person quickly, but the high one feels after a cup of coffee does not remain for a long time, and he is down to normal levels with a thud in quick time, as well. read more

Keep in mind that the actual caffeine content of a cup of coffee or tea can vary considerably because of factors such as origin, processing and preparation method, including brewing time. So use these numbers as a guide. The charts below show typical caffeine content in popular beverages. Drink sizes are in fluid ounces (oz.) and milliliters (mL). read more