Caffeine is classified as a chemical compound with a pharmacological effect rather than as a nutrient. However, it is also considered a supplement or active ingredient for dietary supplements. This ingredient can be found in multiple foods of daily use, such as coffee, green and black tea, guarana, coca cola, chocolate and even in energy drinks and gels.

The caffeine content varies considerably depending on the product and even on the preparation method. Out of curiosity, here are some reference values:

  • 1 cup of coffee = 95-200mg of caffeine
  • 1 cup of black tea = 40-120 mg of caffeine
  • 1 cup of green tea = 15-60 mg of caffeine
  • Sports / energy drinks caffeine = 48-300 mg / dose
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