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I have never felt after drinking tea that I can have the power of being able to work late at night. Neither have I felt that it helps me to be awake while working or keeping eyes opened while I am not in mood for sleeping.

Drinking tea, then, does not helps me to stay awake.

Is it the nature of the tea itself, or does it have to do with how the body processes caffeine?

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  • $\begingroup$ @jonsca, I would like if you edit it to make it more meaningful or more powerful. $\endgroup$
    – NullPointer
    Apr 22, 2014 at 5:15
  • $\begingroup$ I have given it a try, you can always modify it again if necessary. $\endgroup$
    – jonsca
    Apr 22, 2014 at 5:59

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It could be tolerance if other caffeinated beverages are usually consumed, however it also depends on the type of tea itself, and other properties, such as how long the tea has steeped for.

For example, brewed black tea can have anywhere from 14-61 mg of caffeine, which is a large range and depends on which tea you are drinking specifically. Whereas if you were drinking green tea that has not been steeped for long, it can have 24-40 mg of caffeine, which at the lower range will probably not help you stay awake.

From MayoClinic.Org:

The actual caffeine content of the same coffee drink can vary from day to day — even at the same coffee shop — because of various factors, such as roasting and grinding, as well as brewing time. The caffeine content of tea also is affected by how long it's brewed.

Caffeine beverage levels can be found here:

http://www.mayoclinic.org/healthy-living/nutrition-and-healthy-eating/in-depth/caffeine/art-20049372

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Another idea I have come across is that caffeine absorption is much slower with tea, though my source is a Good Eats Episode. The relevant information can be found at approximately 19 min. Maybe it's true, maybe it's not, but regardless, it's a great episode to watch if you are into tea.

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What is happening to you is 'tolerance'. It is a term used in pharmacology. It is a phenomenon by which a drug/medicine becomes less effective the body gets used to it. One explanation is less receptors for that drug are manufactured because of negative feedback. You may have developed tolerance to tea.

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    $\begingroup$ He said that he has never felt that tea has been helpful. Couldn't another explanation simply be that there's less caffeine in tea than coffee? $\endgroup$
    – jarlemag
    Apr 22, 2014 at 12:21
  • $\begingroup$ @jarlemag, thanks but even coffee is not helpful to stay awake. So can I say that my body is not consuming Tea or Coffee as they should affect to my body? I am not saying I am unnatural but many people complains if they drink Tea or Coffee they could not sleep easily but for me drinking them never helps. $\endgroup$
    – NullPointer
    Oct 24, 2015 at 13:29

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