カフェイン

かふぇいん
noun
caffeine
foodhealth
1. caffeine
The stimulant found in coffee, tea, and many soft drinks that helps keep one awake and alert.
コーヒーにはカフェインが多(おお)い。
Coffee has a lot of caffeine.
夜(よる)はカフェインを取(と)らないようにしている。
I try not to take in caffeine at night.
カフェインの取(と)りすぎは眠(ねむ)れなくなる原因(げんいん)になる。
Taking in too much caffeine can be a cause of being unable to sleep.

A loanword (from English "caffeine"). Found in coffee, tea, and energy drinks; valued as a stimulant but a concern when consumed in excess.

Common collocations

  • カフェインを取(と)る: take in / consume caffeine
  • カフェイン入(い)り: containing caffeine
  • カフェインレス: decaf (most of the caffeine removed)
  • ノンカフェイン: naturally caffeine-free (barley tea, rooibos)
  • カフェインの取(と)りすぎ: too much caffeine
general
Added 2026.5.23 11:04 · Revised 2026.10.13 23:04
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