4 citations
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April 1983 in “The Journal of Dermatology” A 15-year-old girl with hypothyroidism had excess hair and skin issues due to blocked hair follicles.
12 citations
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September 1990 in “The Anatomical Record” Human anagen hair follicles have unique carbohydrate patterns during keratinization.
July 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Thymic stromal lymphopoietin (TSLP) promotes hair growth by stimulating specific skin cells.
39 citations
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February 1990 in “The journal of cell biology/The Journal of cell biology” Trichohyalin, a hair follicle protein, has a part with repeating patterns of 23 amino acids.
Trichohyalin, a protein from pig tongue, was purified and found to have a filamentous structure.
The 10% hibiscus leaf extract hair tonic promotes better hair growth than 2% minoxidil but can irritate eyes.
June 2020 in “The journal of investigative dermatology/Journal of investigative dermatology” The enzymes Tet1, Tet2, and Tet3 are important for the development of hair follicles and determining hair shape by controlling hair keratin genes.
44 citations
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July 1993 in “Journal of Investigative Dermatology” 59 citations
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February 2019 in “BMC Genomics” Hair length in rabbits is linked to differences in lipid metabolism and cell death.
7 citations
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May 1988 in “International Journal of Dermatology” The patient's hair has unique structural differences with alternating bright and dark bands.
4 citations
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November 2016 in “The Journal of Dermatology” Pili torti hair is fragile due to loose keratin filaments and weak disulfide bonds.
31 citations
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September 1996 in “Differentiation” The upper dermal sheath can regenerate hair in rats.
183 citations
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July 2000 in “American Journal of Botany” Root hairs help Arabidopsis plants absorb more phosphorus when it's scarce.
August 1994 in “Journal of Dermatological Science”
5 citations
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March 2009 in “Pediatric Dermatology” The study found that pili bifurcati causes hair to intermittently split into two branches, each with its own outer layer.
15 citations
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January 1992 in “Sen'i Gakkaishi” The Cell Membrane Complex in hair has both water-attracting and water-repelling layers.
October 2025 in “Journal of Investigative Dermatology” Hair follicle dermal stem cells help control hair growth timing by regulating signals at the hair germ–dermal papilla interface.
11 citations
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January 2016 in “Biointerphases” The hair's outermost surface has multiple layers of lipids and proteins.
274 citations
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June 2011 in “Science” Proteins with added sugars are crucial for plant root hair growth.
November 2022 in “Journal of Investigative Dermatology” Activating a bitter taste receptor in hair follicles can stop hair growth by increasing a specific growth factor.
2 citations
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August 2020 in “Natural Product Communications” A mix of Platycladus orientalis leaf extract and alpha-terpineol helps mice grow hair by increasing growth factors and cell growth.
Certain short peptides can increase root hair growth in tobacco plants.
April 2025 in “International Journal of Molecular Sciences” Iris-exosomes may help treat hair loss by activating hair growth pathways.
43 citations
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November 1988 in “The Journal of Comparative Neurology” Different types of hairs on a rat's hindlimb have varying levels and patterns of nerve innervation.
75 citations
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July 2016 in “New phytologist” The protein RSL4 is crucial for making root hairs longer by controlling genes related to cell growth.
September 1973 in “Primates”
January 2014 in “Journal of the Korean Society of Design Culture” The study confirmed that changes in hair structure in women with hair loss conditions matched what is taught in beauty college trichology courses.
April 2024 in “Jurnal Agroindustri Halal/Jurnal agroindustri halal” The hair tonic with the highest seaweed extract content showed the best hair growth results.
September 2016 in “Journal of dermatological science” The conclusion is that the variation in hair thinness in patients is mostly due to the amount of underdeveloped hairs, and treatments that thicken fine hairs might work for those with mild to severe conditions.
October 2021 in “Borneo Journal of Pharmascientech” A mix of garlic and candlenut oils boosts rabbit hair growth best at 200 ppm each.