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Updated: Mar 17, 2026

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Caffeine Withdrawal and Headaches.

G J Rubin1, A P Smith1

  • 1a Department of Experimental Psychology , University of Bristol , 8 Woodland Road, Bristol BS8 1TN , UK.

Nutritional Neuroscience
|July 15, 2016
PubMed
Summary
This summary is machine-generated.

Caffeine withdrawal headaches increase when people believe they have stopped consuming caffeine. This effect was only significant in participants who could correctly identify caffeinated versus decaffeinated beverages, highlighting the role of perception.

Keywords:
CaffeineCaffeine withdrawalDiscrimination of caffeineExpectancy effectsHeadache

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Area of Science:

  • Neuroscience
  • Psychology

Background:

  • Caffeine withdrawal is commonly associated with headaches.
  • Recent studies suggest subjective perception may influence caffeine withdrawal symptoms.

Purpose of the Study:

  • To investigate the role of subjective perception in caffeine withdrawal headaches.
  • To determine if the ability to discriminate beverage type affects headache incidence during caffeine withdrawal.

Main Methods:

  • Forty-three low caffeine consumers participated in the study.
  • Participants recorded headache incidence while consuming caffeinated or decaffeinated beverages.
  • Beverage consumption was manipulated to create withdrawal conditions.

Main Results:

  • Headache incidence increased during caffeine withdrawal.
  • This increase was statistically significant only in participants who could accurately distinguish between caffeinated and decaffeinated beverages.
  • Perception of caffeine withdrawal played a key role in headache occurrence.

Conclusions:

  • Subjective perceptions and expectancies significantly influence the caffeine withdrawal syndrome.
  • The findings challenge the notion of widespread physical dependence on caffeine among consumers.
  • Individual expectancies, rather than solely physiological dependence, may drive caffeine withdrawal symptoms.