caffeine
das Koffein
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caffeine
A chemical substance with a stimulating effect on the central nervous system that occurs naturally in coffee beans, tea leaves, cocoa beans, and kola nuts.
Ich trinke abends keinen Kaffee mehr, weil mich das Koffein vom Schlafen abhält.
I don't drink coffee in the evening anymore because the caffeine keeps me from sleeping.
| gender | neuter das |
|---|---|
| genitive | des Koffeins |
| singular | plural | |
|---|---|---|
| nominative | das Koffein | – |
| accusative | das Koffein | – |
| dative | dem Koffein | – |
| genitive | des Koffeins | – |
The article changes with the case; it is shown in colour.
The word is derived from 'Kaffee' (coffee). The ending '-in' is often used in German for chemical substances and active ingredients, as in 'Aspirin' (aspirin) or 'Penicillin' (penicillin).
Koffein ist der anregende Wirkstoff im Kaffee.
Caffeine is the stimulating active ingredient in coffee.
'Koffein' (caffeine) is an uncountable noun (a substance name). Therefore, it is usually used without an article or with quantity words such as 'viel' (much / a lot of), 'wenig' (little), or 'kein' (no).
Dieser Tee enthält nur sehr wenig Koffein.
This tea contains only very little caffeine.
Ich brauche morgens eine große Dosis Koffein, um wach zu werden.
I need a large dose of caffeine in the morning to wake up.
In everyday life, the derived adjectives 'koffeinhaltig' (containing caffeine / caffeinated) and 'koffeinfrei' (without caffeine / decaffeinated) are very useful. You often find them on drink packaging.
Möchten Sie normalen oder koffeinfreien Kaffee?
Would you like regular or decaffeinated coffee?
Cola und Energydrinks sind koffeinhaltige Getränke.
Cola and energy drinks are caffeinated beverages.
