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Patch-testing with Main Sensitizers Does Not Detect All Cases of Contact Allergy to Oxidized Lavender Oil.

Journal article
Authors Lina Hagvall
Johanna Bråred Christensson
Published in Acta Dermato-Venereologica
Volume 96
Issue 5
Pages 679-683
ISSN 0001-5555
Publication year 2016
Published at Institute of Clinical Sciences, Department of Dermatology and Venereology
Department of Chemistry and Molecular Biology
Pages 679-683
Language en
Links dx.doi.org/10.2340/00015555-2319
Subject categories Dermatology and Venereal Diseases

Abstract

Lavender oil is an essential oil obtained from lavender (Lavendula angustifolia). The main components linalool and linalyl acetate have been shown to autoxidize in contact with oxygen in the air, forming sensitizing hydroperoxides. Patients with suspected allergic contact dermatitis were consecutively patch-tested with oxidized lavender oil 6% pet., oxidized linalyl acetate 6% pet., and oxidized linalool 6% pet. to investigate the frequency of contact allergy to oxidized lavender oil, and the pattern of concomitant reactions to oxidized linalool and oxidized linalyl acetate. Positive reactions to oxidized lavender oil were found in 2.8% of the patients. Among those, 56% reacted to oxidized linalool and/or oxidized linalyl acetate, while 52% reacted to the fragrance markers of the baseline series. Oxidized lavender oil showed among the highest frequencies of contact allergy to studied essential oils. A well-standardized preparation of oxidized lavender oil could be a useful tool for diagnosis of contact allergy to fragrances.

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