3 citations
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December 2019 in “Biomedical dermatology” Sonic hedgehog proteins may help grow hair.
54 citations
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January 2013 in “BMC Complementary and Alternative Medicine” Thuja orientalis hot water extract may help hair grow by starting the growth phase and improving hair follicle development.
April 2024 in “American Journal of Case Reports” Quitting smoking stopped unusual hair growth in the airway.
December 2023 in “Journal of Food Science and Nutrition” Rosehip Seed Oil may help hair grow by activating important growth pathways and increasing hair follicle size in mice.
194 citations
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May 2000 in “Journal of Investigative Dermatology” The hedgehog signaling pathway is crucial for hair growth but not for the initial creation of hair follicles.