Incubatory environment of the scalp impacts pre-emergent hair to affect post-emergent hair cuticle integrity

Journal of Cosmetic Dermatology
James R SchwartzNancy Redman-Furey

Abstract

To determine whether the oxidative stress transmitted to newly grown hair from an unhealthy scalp has physical consequences to the cuticular condition and function. A uniquely designed 24-week clinical study included 8 weeks of pretreatment with a cosmetic shampoo and 16 weeks of treatment with either a potentiated zinc pyrithione (ZPT) antidandruff shampoo or a placebo cosmetic shampoo. This clinical design allowed the growth and acquisition of hair samples under conditions of varying but known scalp health as a result of treating a dandruff/seborrheic dermatitis (D/SD) population. Two complementary methods were used to characterize the integrity of the cuticular surface. Hair surface hydrophobicity was assessed by quantifying water wetting force using a Wilhelmy balance method. Surface structure and porosity were assessed using dynamic vapor sorption (DVS) to gravimetrically quantify water sorption. Chemical oxidative stress to pre-emergent hair has been shown to have negative consequences to hair surface structure. Compared to a placebo shampoo control, use of a potentiated ZPT shampoo improved scalp health and significantly improved the following attributes associated with healthy hair: hair surface hydrophobicity (surface ...Continue Reading

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Citations

May 2, 2021·International Journal of Cosmetic Science·Antonella Tosti, James R Schwartz
Dec 5, 2019·Skin Appendage Disorders·Ralph M TrüebChuchai Tanglertsampan
Apr 8, 2020·Skin Appendage Disorders·Murilo Calvo PerettiRalph M Trüeb

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