Siden opdateres ikke længere

Videncenter for Duft- og Kemikalieoverfølsomhed er lukket med udgangen af 2013, og siderne på denne hjemmeside bliver ikke længere opdateret. Datoen for seneste opdatering af sidens indhold ses nederst på de enkelte sider. Bemærk, at der kan være kommet ny viden siden sidste opdatering.

Astma-Allergi Danmark har påtaget sig at videreføre rådgivningen som en udvidelse af foreningens eksisterende tilbud til mennesker med følsomme luftveje. Det er muligt at ringe til Astma-Allergi Danmark på alle hverdage fra kl. 10-12 og tillige om onsdagen fra kl. 16-18. Astma-Allergi Danmark har integreret viden om duft- og kemikalieoverfølsomhed på foreningens hjemmeside Det ligger fra forsiden under overskriften MCS og kan findes her:


Different factors have been associated with development of multiple chemical sensitivity (MCS): 

  • Some MCS patients report that their symptoms started after having been exposed to sudden high doses of chemicals, after spills or accidents involving solvents or pesticides 
  • Others describe symptoms occurring after having been exposed to prolonged low doses of chemicals, for example degassing of chemicals in buildings with indoor climate problems, or from surfaces that have been inappropriately treated, e.g. by indoor use of fungicides
  • Factors such as infections, stress, psychological and physical trauma have also been described as important to the development of MCS
  • However, for many with severe MCS, the symptoms have evolved gradually, and it is not possible to identify a specific exposure as a cause.

Several theories
Several theories as to why some people experience symptoms when exposed to common airborne chemicals have been suggested, but no theory is documented well enough to be able to say that we know the cause.


Various studies have suggested that MCS could be linked to:

  • Nervous system response to chemical substances, including, for example, an abnormal response to sensory stimuli, i.e. central sensitization.
  • Emotional or cognitive factors, such as anxiety or recollection of past unpleasant experiences involving scents.
  • Stress
  • Immune response to exposure to chemicals.
  • Genetic factors.

It is likely that the cause of MCS is multifactorial and that several of the above factors influence the development and maintenance of the condition.


The Research Centre's research is based on a mulitfactorial model. Read more about our research.

What MCS is not
Although the MCS symptoms may be similar to symptoms of allergy or intoxication, the mechanisms are likely different.

Read more about why MCS cannot be described as an allergy or intoxication.

MCS as a functional disorder
Multiple Chemical Sensitivity is classified as a functional disorder in some contexts.

Functional disorders are defined as conditions where the patients experience symptoms without an identifiable medical explanation, resulting in impairment of the patient.

The Danish Research Centre for Chemical Sensitivities | Ledreborg Allé 40, 2 | DK-2820 Gentofte | Phone + 45 39 77 73 04 | Last updated 23.10.12 | Contact web editor
The Research Centre is funded by the Danish Environmental Protection Agency and is a part of the Department of Dermato-Allergology at Copenhagen University Hospital, Gentofte