The caffeine level in a prepared Espresso capsule is around 55-65 mg. The fact that the Lungo varieties contain 20% more coffee means that the quantity of caffeine can vary between 77 and 89 mg per capsule. The difference largely depends on the green coffee used (Arabica or Robusta), the degree of roasting and, to a lesser extent, where the coffee beans come from.
- Espresso (1.35 oz/40 ml) --> around 55-65 mg of caffeine
- Lungo (3.75 oz/110 ml) --> around 77-89 mg of caffeine
- Decaffeinated coffees --> between 2 and 3 mg of caffeine
There is no link between "intensity" and caffeine level. Caffeine is a colourless and flavourless substance that is released after contact with water. The more water is added to the coffee, the more caffeine it will contain.
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