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Intrinsic and Extrinsic Factors Affecting Skin Surface pH.

Miranda A Farage, William Hood, Enzo Berardesca

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    Petrolatum-based emollients help maintain healthy skin acidity. This study clarifies that these products stabilize skin pH, debunking previous findings of pH increase due to measurement artifacts.

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    Area of Science:

    • Dermatology
    • Biochemistry
    • Cosmetic Science

    Background:

    • The skin's natural slightly acidic pH, known as the

    Purpose of the Study:

    • To investigate the effect of petrolatum-based emollients on skin pH.
    • To address discrepancies in previous studies regarding emollient impact on skin pH.

    Main Methods:

    • Utilized traditional skin pH measurement techniques.
    • Analyzed the influence of petrolatum-based emollients and their components on stratum corneum pH.

    Main Results:

    • Identified that certain petrolatum-based emollients create a protective barrier, aiding in maintaining skin's natural acidity.
    • Demonstrated that observed increases in skin pH in prior studies were likely artifacts of the measurement technique.
    • Provided evidence that emollients stabilize, rather than negatively affect, balanced skin pH.

    Conclusions:

    • Petrolatum-based emollients can support the skin's natural acid mantle.
    • Researchers and clinicians should consider potential measurement artifacts when evaluating emollient effects on skin pH.