January 2007 Hair coloring and bleaching can permanently break down hair protein and temporarily change its properties.
June 2017 in “DOAJ (DOAJ: Directory of Open Access Journals)” Combining finasteride with dimethyl-β-cyclodextrin improves its absorption and bioavailability.
Oxidized hair can naturally regain strength and stability over six months.
49 citations
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February 2009 in “International journal of pharmaceutics” Artificial sebum L closely mimics human sebum for drug delivery research.
21 citations
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March 2017 in “Skin research and technology” Removing external lipids from hair reduces moisture and increases strength, while removing internal lipids decreases water permeability.