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Related Experiment Video

Updated: Feb 18, 2026

Author Spotlight: Assessing the Olfactory Effects of Airborne Pollutants — Buried Food and Social Odor Tests
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Reduction of olfactory sensitivity during normobaric hypoxia.

Tilman Huppertz1, Jessica Freiherr2, Bernhard Olzowy3

  • 1Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Center, Johannes Gutenberg University, Mainz, Germany.

Auris, Nasus, Larynx
|November 21, 2017
PubMed
Summary

Exposure to normobaric hypoxia significantly reduces olfactory sensitivity and intensity perception in healthy individuals. This study investigated changes in smell and taste functions under simulated high-altitude conditions.

Keywords:
Normobaric hypoxiaOlfactory functionSmellTaste

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Area of Science:

  • Physiology
  • Altitude Medicine
  • Sensory Science

Background:

  • Acute mountain sickness (AMS) is triggered by reduced oxygen availability at high altitudes (above 2500m).
  • Understanding the impact of hypoxia on sensory functions is crucial for acclimatization and well-being at altitude.

Purpose of the Study:

  • To assess the effects of normobaric hypoxia on olfactory and gustatory abilities in healthy subjects.
  • To compare sensory function under baseline conditions versus simulated high-altitude exposure.

Main Methods:

  • Sixteen healthy participants underwent olfactory and gustatory assessments.
  • Sensory evaluation included the Sniffin' Sticks test and Taste Strips, along with intensity and pleasantness ratings.
  • Testing occurred at baseline (518m) and after 7 hours of normobaric hypoxia (simulating 4000m).

Main Results:

  • Normobaric hypoxia significantly impaired olfactory sensitivity.
  • Intensity ratings for smells were also significantly reduced under hypoxic conditions.

Conclusions:

  • Normobaric hypoxia demonstrably decreases olfactory sensitivity and intensity perception.
  • These findings highlight the impact of reduced oxygen partial pressure on sensory function, relevant to high-altitude environments.