Caffeine

Caffeine is the drug in coffee and tea, which causes us to feel more awake, to have more energy and to be able to focus more, but like any drug, too much caffeine can be bad for us.

So, how much is too much?

Well, when we use a drug, our bodies (and our minds) build up a tolerance to that drug. This mean that our bodies and minds become familiar with the drug and are therefore less affected by it.

So, for someone who has been drinking coffee regularly, for a long time, their tolerance to caffeine will be higher than someone who has not drunk coffee before. They will need to drink more coffee to feel the effects.

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