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Sebum levels during the first year of life

P Agache, D Blanc, C Barrand

    The British Journal of Dermatology
    |December 1, 1980
    PubMed

    Insights

    Sebum levels in newborns are high, similar to adults, with distinct patterns in males and females. These levels decrease significantly by six months of age.

    Area of Science:

    • Dermatology
    • Neonatal Physiology
    • Endocrinology

    Background:

    • Neonatal skin presents unique physiological characteristics.
    • Sebum production plays a role in skin barrier function.
    • Hormonal influences on neonatal skin are not fully elucidated.

    Purpose of the Study:

    • To quantify skin surface lipid (sebum) levels in newborns and infants.
    • To investigate sex-specific differences in sebum excretion patterns during early infancy.
    • To explore potential prenatal hormonal influences on neonatal sebum production.

    Main Methods:

    • Optical density method used for sebum quantification.
    • Samples collected from 45 newborns and 193 infants (<12 months).
    • Analysis of sebum levels across different age points and sexes.

    Main Results:

    • Very high sebum levels observed in the first week of life, comparable to adult levels.
    • Distinct sexual dimorphism in sebum excretion patterns noted.
    • Females showed a surge in sebum between days 3-6, while males maintained higher levels post-birth; levels were low in both sexes by 6 months.

    Conclusions:

    • Suggests significant prenatal stimulation of sebum secretion, likely diminishing post-birth.
    • Androgens, potentially dehydroepiandrosterone (DHEA), may be involved in this stimulation.
    • Neonatal sebum profiles indicate a transient but pronounced hormonal influence.

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