Scientists have discovered the reason why coffee affects all of us differently and have released this animated video to explain why.

So if you've ever wondered why one shot of espresso sends your friend up the wall, while you can sink four cans of Red Bull before bed, then this will explain why.

The experts at the Institute for Scientific Information on Coffee say it's all down to the caffiene, but we probably could have guessed that ourselves.

But with an average of 75 to 100mg of the addictive chemical per cup, how are body reacts to it is the key.
Does drinking a single shot or espresso wake you up pr send you hyper? (
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Getty)

The scientists say there are three main components:

  1. Genetics
  2. Age
  3. Habit

"Genetic variability can impact how individuals metabolise caffeine, as can age, younger people seem to be less sensitive than older people," an ISIC spokesman said.
Regular coffee drinkers may notice less of a difference (
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Getty)

"Regular coffee drinkers may be less sensitive to the effects of caffeine, and if someone drinks more coffee than they usually do, it may affect sleep patterns or lead to hyperactivity.

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"These effects are usually short lived once a person returns to their regular pattern of consumption."

The Institute for Scientific Information on Coffee is a not-for-profit organisation, established in 1990 and devoted to the study and disclosure of science related to “coffee and health.