October 2001 in “Dermatologic Surgery” Cutting and implanting hair follicles can create finer, more natural-looking hairlines, with about half of the implanted hairs growing back.
12 citations
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January 2014 in “Cell structure and function” Different combinations of human hair keratins affect how hair fibers form.
7 citations
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May 2022 in “PLOS ONE” Certain genes and pathways are linked to the production of finer and denser wool in Hetian sheep.
5 citations
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April 2024 in “Animals” Younger cashmere goats produce more and better-quality fiber due to higher active hair follicles and antioxidant capacity.
4 citations
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May 2024 in “Genes” KRT81 gene variations in sheep affect wool weight but not fiber length or thickness.
2 citations
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May 2023 in “Journal of Advanced Research” Two mutations in KRT74 and EDAR genes cause sheep to have finer wool.
11 citations
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January 2015 in “Annals of Dermatology” Using a hair removal laser can make hairs finer for better hairline correction in hair transplants, with most patients happy and few side effects.
7 citations
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January 2009 in “BMJ Case Reports” Gefitinib can cause slower, finer, brittle, and curly scalp hair.
6 citations
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December 2019 in “International Journal of Cosmetic Science” White hair has weaker tryptophan fluorescence than other unpigmented fibers, possibly due to UV exposure or unknown substances.
August 2025 in “Scientific Reports” Itchy keloids on the chest are linked to more nerve fibers and substance P.