Fragrance has been chosen by The American Contact Dermatitis Society as ‘Allergen of the year
2007’
.
A perfume may contain hundreds of different chemicals, including
fragrances, some of which mat be complex substances. More than 2,800
fragrance ingredients are known and at least 1000 of these are
known allergen.
Recently, the European Union (EU) designated 26 fragrance
allergens as requiring labeling on cosmetic and detergent products.
Many people are sensitive to fragrances (ie, have positive
patch-test reactions), but not all of these individuals have clinical
allergies to fragrances (allergic contact dermatitis, ACD). An allergy
itself is a disease whereas a positive patch-test result is an allergic
reaction. Thus a person may be sensitive (e.g. as shown by patch
testing) to fragrance, but not necessarily develop clinical allergy
(e.g. ACD).
When dermatologists advise their patients to avoid all products
containing fragrances on the basis of a very weak positive
(e.g. irritant) fragrance mixed patch-test reaction,
the patients are deprieved of one of life's pleasures.
Of cource patients with very strong product
fragrance reactions should be urged to use caution when
selecting scented products.
Much mystery still surrounds fragrances and perfumes. Therefore
many people seek "natural" scents, which may, however, give rise to
troublesome allergies.
Reference: Frances J. Storrs. Allergen of the year. Dermatitis: 2007;18(1):3-7.