Caffeine

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What is Caffeine

Caffeine is a drug that is naturally produced in the leaves and seeds of many plants. It's also produced artificially and added to certain foods. Caffeine is defined as a drug because it stimulates the central nervous system.
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Short term effects

  • Feeling more alert and active
  • Dizziness
  • Dehydration
  • Higher body temperature
  • Faster breathing and heart rate
  • Headache and lack of concentration
  • Stomach pain

Long term effects


  • High blood pressure and heart disease
  • Heartburn
  • Difficulty sleeping
  • Depression
  • Nausea and vomiting
  • Very fast and irregular heart rate
  • Confusion and panic attack

Interesting Facts


  1. ProductAverage caffeine content
(mg/100 ml)

Red Bull® 32.0

Mountain Dew® 15.0

Coca Cola® 9.7*

Diet Coke® 9.7*

Coke Zero® 9.6*

Brewed black tea 22.5

Brewed green tea 12.1

Coffee, cappuccino 101.9

Coffee, flat white 86.9

Coffee, long black 74.7

Coffee, from ground coffee beans, espresso style 194.0

Chocolate, milk with added milk solids 20.0

Chocolate, dark, high cocoa solids 59.0

2. Caffeine stays in the body for hours.

3. Death from too much caffeine is rare, but possible.

4. Caffeine can be found in unusual places.

5. Coffee beans come from a red fruit.