August 2024 in “Biophysics Reviews” Mammal hairs have different internal structures.
22 citations
,
July 1990 in “Acta Dermato Venereologica” High levels of testosterone and dihydrotestosterone inhibit hair cell growth, while high levels of estradiol promote it.
96 citations
,
December 1995 in “Journal of Investigative Dermatology” 5 citations
,
July 2005 in “British journal of dermatology/British journal of dermatology, Supplement” A man grew hair on his penis, which is not common, and needed surgery to remove it.
109 citations
,
February 2018 in “CB/Current biology” ERULUS controls root hair growth by regulating cell wall composition and pectin activity.
15 citations
,
January 1988 Hair follicles have unique proteins that vary by species and are influenced by nutrition.
24 citations
,
July 2015 in “Biogeosciences” A fungus is essential for forming and shaping hair ice on dead wood.
November 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Croton tiglium Linn. may promote hair growth but needs careful detoxification due to its toxicity.
December 2011 in “URMIA MEDICAL JOURNAL” Glycoconjugate sugars are important for hair follicle development.
July 2023 in “New phytologist” The BUZZ gene is important for root hair growth and overall root structure in the plant Brachypodium distachyon.
34 citations
,
August 1966 in “Experimental cell research” Keratin fibrils in hair form and stop growing at specific points in the follicle.
July 2024 in “PLANT PHYSIOLOGY” CIPK13 and CIPK18 genes are crucial for root hair growth in plants.
7 citations
,
March 2005 in “Journal of dermatological science” Apoptosis helps shape hair growth and prepares the skin for hair to emerge.
4 citations
,
March 2022 in “BioEssays” Hydra can help understand human hair follicle microbiomes and develop new skin disease therapies.
April 2024 in “Cellular signalling” Activating TRPMLs helps human cells important for hair growth and increases hair growth in mice.
27 citations
,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology”
December 2022 in “Frontiers in plant science” CCDC22 and CCDC93 are essential for root and root hair growth in Arabidopsis.
December 2021 in “Jurnal ilmiah Manuntung” The best hair growth results were achieved with a hair tonic containing 5% gotu kola extract and 0.04% garlic extract.
April 2024 in “The journal of phytopharmacology” Orchid callus extract can help hair grow and may be used in eco-friendly hair products.
4 citations
,
January 1981 in “PubMed” Hair medullary cells in mammals vary in complexity, with humans having more structured cells similar to inner root sheath cells.
Calcium and hydrogen ions help root hair growth, while aluminum inhibits it.
6 citations
,
August 2008 in “Journal of Forensic Sciences” Recognizing specific tissue types on telogen hair roots can improve DNA typing.
35 citations
,
September 2003 in “Archives of dermatology” Tiger tail bands in hair are caused by wavy hair fibers with melanin, unlike straight fibers in normal hair.
January 2026 in “Journal of Materials Chemistry B” A special solvent helps hydroxytyrosol penetrate skin better, promoting hair growth.
April 2024 in “bioRxiv (Cold Spring Harbor Laboratory)” A gene network led by RSL4 is crucial for early root hair growth in response to cold in Arabidopsis thaliana.
50 citations
,
March 2004 in “Trends in Plant Science” NADPH oxidase and phospholipase D help root hairs grow by activating calcium channels.
13 citations
,
January 2001 in “Pediatric dermatology” A dark-haired Chinese girl had hair that looked banded under certain light but was normal under a microscope.
25 citations
,
July 2004 in “Experimental Dermatology” Illicium anisatum extract may boost hair growth.
July 1990 in “British Journal of Dermatology” 2 citations
,
December 2017 in “Korean Journal of Medicinal Crop Science” Houttuynia cordata extract promotes hair growth and could be useful in hair care products.