Colophony as marker for fragrance allergy in the general European population.
Colophony is not used as a fragrance ingredient. However, colophony is a well-established marker of fragrance contact allergy(2-4) . Colophony was therefore included as a fragrance allergy marker in our recent paper in BJD on contact allergy in the general population (prevalence 1.0%; 95%-CI 0.6%-1.3%)(5) . When including colophony as a fragrance marker in the article on fragrance contact allergy(
