The guide suggests using keratin fibers and wigs to help hair look thicker or hide hair loss.
6 citations
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December 2013 in “Journal of Cosmetic Dermatology” Pigmented concealing powders can improve the look of hair density for people with hair loss but need daily application and may not work well in wet conditions.
30 citations
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March 2019 in “Archives animal breeding/Archiv für Tierzucht” The KRTAP15-1 gene affects cashmere fiber thickness in goats.
22 citations
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August 2015 in “PloS one” Keratin from hair binds well to gold and BMP-2, useful for bone repair.
1 citations
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January 2017 in “PubMed” All five hair fiber products improved appearance but didn't stick to completely bald areas.