35 citations
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January 2020 in “Journal of the American Academy of Dermatology” Avoiding certain allergens in personal care products may improve symptoms for some patients with lichen planopilaris or frontal fibrosing alopecia.
16 citations
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December 2016 in “Skin appendage disorders” Nickel, cobalt, balsam of Peru, fragrance mix, carba mix, and propylene glycol are common allergens causing scalp contact dermatitis.
5 citations
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July 2022 in “PubMed” Hair dyes, shampoos, and conditioners often cause scalp allergies due to common allergens like p-phenylenediamine and nickel.
3 citations
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September 2017 in “Pediatric Dermatology” Avoiding allergens can improve skin and hair conditions in adults with allergic reactions.
Modern shampoos use a mix of surfactants and other ingredients to clean, reduce irritation, and improve performance.