Contact allergy to methylisothiazolinone with three clinical presentations in one patient

Allergen content of popular chemical hair relaxers: A product analysis

BACKGROUND

Chemical hair relaxers are widely utilized by black women, yet little research exists on the allergens present in these products.

OBJECTIVE

This study aims to investigate allergen prevalence in the most popular chemical hair relaxers.

METHODS

We analysed 41 products from five major retailers, identifying allergens through ingredient lists and comparing them to the 2020 American Contact Dermatitis Group Core allergen series.

RESULTS

The most common contact allergens in chemical relaxers include propylene glycol, cetyl steryl alcohol, fragrance, D/L-a-tocopherol, tea tree oil and cocamidopropyl betaine.

CONCLUSION

Understanding allergen exposure in products used by individuals with textured hair is needed for managing contact dermatitis in diverse populations. This analysis underscores the presence of potential allergens in hair relaxers, emphasizing the importance of dermatologists' awareness and patient scrutiny of ingredient lists.

Allergic contact dermatitis to isothiazolinones in a rubber factory: A case report

Isothiazolinones, used as preservative, are known to be skin sensitizers. Although cosmetics represent their main source, occupational exposure may be a significant origin of eczema. While allergic eczema related to these derivates have been reported in a number of professional sectors, their presence in the same workplace was not common.

Isothiazolinones are commonly known as skin sensitizers in both domestic and workplace areas. Rubber manufacturing should be considered as a possible occupational exposure to isothiazolinones. This consideration will facilitate further declaration and recognition of allergic dermatitis related to these substances in this specific workplace.