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I feel that if I have unsweetened tea, it has a stronger hit. i.e. it is more stimulating than a similar cup of tea in which some sugar has been added. I can say the same about coffee.

Is it just me or is it something which is commonly perceived?

Is there a biochemical basis for this feeling or is it psychological due to the slight bitter taste?

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closed as primarily opinion-based by Chris Stronks, Krysta, Steven Jeuris Dec 10 at 9:47

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise.If this question can be reworded to fit the rules in the help center, please edit the question.

    
my money is on and entirely biochemical and physical, tastebud-reason. –  Benteh Dec 22 '13 at 0:40

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