January 2010 in “EPub Bayreuth (University of Bayreuth)” This study found that Polyquaternium-87 significantly reduced friction forces on hair surfaces treated with various shampoo formulations, highlighting its potential for improving hair care products.
February 2026 in “Journal of the Korean Society of Cosmetology” This study found that the viscosity of silicone oil in hair treatments significantly affects wave curling performance and hair damage, with untreated and chemically treated hair showing different optimal viscosities.
This study found that coconut oil may protect the cuticle of chemically treated hair, which tends to be damaged compared to untreated hair.
March 2021 in “Cell stem cell” This study found that actomyosin contractility in suprabasal keratinocytes influences the proliferation and differentiation of epidermal stem/progenitor cells by acting as a niche element in the skin.
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October 1954 in “Textile Research Journal” This study found that alkali bromide solutions are absorbed into hair depending on salt activity, and the presence of the salt increases water absorption compared to normal conditions.