4 citations
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September 2003 in “Livestock Production Science” Epidermal growth factor reduces hair growth, but cortisol does not.
90 citations
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January 1979 in “International review of cytology” Wool follicles are complex, involving interactions between different cell types and structures.
35 citations
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February 2006 in “Textile Research Journal” Enzymes xylanase and pectinase clean wool and specialty hair fibers effectively without damage, offering an eco-friendly alternative to soap and hot water.
13 citations
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November 2012 in “International Journal of Dermatology” Curly hair breaks more easily, especially with chemical treatments, but simpler grooming reduces breakage.
34 citations
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October 1982 in “Journal of applied polymer science” Moisture content significantly affects how human hair breaks.