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    The aim of this study was to explore the main factors affecting the occurrence of dandruff in healthy people (nondisease-induced scalp desquamation). This study analyzed the fungal microbial diversity of the scalp in Chinese teenage volunteers and measured scalp sebum secretion, the scalp pH value, and scalp transepidermal water loss. The amount and size of dandruff were measured, and the main factors that influence dandruff in the normal population were identified using principal component analysis. The results showed that an increase in Malassezia restricta led to an increased amount of dandruff in the mild and moderate groups. Conversely, this was not found for individuals in the severe group, whose dandruff symptoms were influenced by scalp barrier function. In terms of dandruff area grouping, the pH value and the amount of sebum secretion were the main factors, with the barrier function and microbial diversity being secondary factors. Dandruff cosmetics should emphasize different treatments for different types of dandruff to achieve better antidandruff effects. The results of this study provide a new theoretical basis for the development of multiple targets for antidandruff agents aimed at the normal population. © 2020 Wiley Periodicals LLC.


    Shi-Yu Wei, Hong-Yan Zhang, Ya-Ting Yin, Lai-Ji Ma, Li Li, Yin-Mao Dong, Fan Yi. Factor analysis approach unveils the influencing factors of dandruff in the normal teenage population. Dermatologic therapy. 2020 Jul;33(4):e13690

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    PMID: 32468693

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