5 citations
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January 2018 in “International Journal of Trichology” Hair strength is similar across different scalp areas, and not affected by age, gender, or hair thickness.
6 citations
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May 2022 in “Frontiers in physiology” Injecting CHIR-99021 into goose embryos improves feather growth by changing gene activity and energy processes.
July 2023 in “Research Square (Research Square)” Skin's uneven surface and hair follicles affect its stress and strain but don't change its overall strength, and help prevent the skin from peeling apart.
19 citations
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October 2018 in “PLOS ONE” 5 alpha-reductase inhibitors can slightly improve symptoms of enlarged prostate but have a high risk of sexual side effects.
Understanding hair surface properties is key for effective hair care products.