A study carried out between 2000 and 2010 has listed all the specific cosmetic products that have caused allergic contact dermatitis, as well as the individual allergenic cosmetic ingredients in each product. Previous to this, information on the particular ingredients responsible for causing allergic contact dermatitis was hard to find.
The researchers, from dermatology departments in both Lisbon, Portugal and Leuven, Belgium, used a standardised form, taking details of reactions to eleven different categories of cosmetic products, skin care products, hair care and body cleansing products. Allergenic ingredients were confirmed in 959 of 1448 records, of which 621 were non-fragrance components of the product. Of the 621, preservatives made up 58% of the allergens.
Among other findings, reactions to formaldehyde and formaldehyde releasers were most often associated with body cleansing products, specifically 2-bromo-2-nitropropane-1,3-diol and skin care products. In sun care products, octocrylene was the most frequent photo(allergen).
This study is useful in providing information on the presence and frequency of allergens in specific cosmetic products.
Source: Journal of Contact Dermatitis
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