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How Long Does Caffeine (Coffee) Stay in Your System

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  • 14th November 2016

What is caffeine

Caffeine is a psychoactive drug that works as a central nervous system (CNS) stimulant. It is consumed by hundreds of millions of people worldwide on a daily basis through staple beverages, snacks and medications like coffee, tea, caffeine tablets, dark chocolate, milk chocolate, etc.

Caffeine Pictures

How long does caffeine stay in your body

Caffeine has a biological half-life of around 3-7 hours in healthy adults. As a result, it can be said that it is expected to be eliminated from the system 16½ -38½ hours after it was taken for the last time. This timeframe is reduced by half in case of nicotine users.

The above calculations are based on averages, in actuality, time required to eliminate caffeine from the system could vary depending on several factors:

  • Age
  • Build
  • Food intake levels
  • Kidney and liver conditions
  • Oral contraceptives (increases time required for caffeine excretion)
  • Pregnancy
  • Dosage
  • Other drugs being taken concurrently

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