June 2025 in “Frontiers in Bioengineering and Biotechnology” Recombinant collagen with nicotinamide boosts hair growth and health.
115 citations
,
November 2008 in “Proceedings of the National Academy of Sciences” Reptiles have genes similar to hair proteins, suggesting hair's genetic origins predate mammals.
The KRTAP36-2 gene in sheep affects wool yield.
February 2025 in “Animals” Amino acid-complexed trace minerals improve hair quality and activity in senior dogs.
13 citations
,
January 2015 in “International Journal of Trichology” Higher lead and cadmium, and lower zinc and iron levels in the blood might be linked to chronic hair loss in women.
2 citations
,
December 2022 in “Metabolites” Hair analysis shows low progesterone in anorexia patients, unchanged by short-term weight gain.
90 citations
,
December 2008 in “Journal of Investigative Dermatology” Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
April 2016 in “Journal of Investigative Dermatology” Lymphoid-specific helicase (Lsh) is crucial for skin growth, change, and healing after injury.
65 citations
,
March 2017 in “Experimental Dermatology” Curly hair is influenced by specific genetic variations.
55 citations
,
February 2014 in “Journal of Structural Biology” Human hair has a complex, variable structure with a consistent matrix and double-twist pattern.
68 citations
,
August 2014 in “PeerJ” Human hair proteins vary by individual, body site, and ethnicity, useful for forensics.
90 citations
,
August 2004 in “Physiological Genomics” Dermal papilla cells help skin stem cells grow into hair.
87 citations
,
February 2000 in “Journal of Investigative Dermatology” Stem cells in developing hair follicles move to specific areas as they mature.
63 citations
,
April 2005 in “Mechanisms of development” Mice with too much Claudin-6 have skin barrier problems and abnormal hair growth.
37 citations
,
October 2015 in “PeerJ” Perming significantly changes hair's molecular structure, while shampoo and conditioner do not.
15 citations
,
January 1988 Hair follicles have unique proteins that vary by species and are influenced by nutrition.
2 citations
,
October 2022 in “Journal of structural biology” Older thin hair is not just thinner but also has different shape, structure, and stiffness.
1 citations
,
November 2022 in “International journal of trichology” A girl with a rare skin condition improved after one month of treatment with acitretin.
1 citations
,
July 2021 in “IntechOpen eBooks” Environmental factors can cause mutations in skin proteins, leading to skin disorders.
November 2023 in “BMC genomics” The study concluded that the arachidonic acid pathway and the protein KRT79 play a role in determining the fineness of cashmere.
July 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” Tet2 and Tet3 enzymes are essential for controlling hair growth by affecting DNA demethylation and gene expression in mice.
128 citations
,
March 2006 in “American Journal of Pathology” Prolactin contributes to hair loss by promoting hair follicle shrinkage and cell death.
91 citations
,
May 2003 in “American Journal of Pathology” Prolactin affects hair growth cycles and can cause early hair follicle regression.
27 citations
,
July 1997 in “PubMed” The harlequin ichthyosis mouse mutation causes thick skin and early death, resembling a human skin disorder.
5 citations
,
March 2017 in “Gene” CAP1 decreases the expression of a hair-related protein in young Tan sheep's skin.
5 citations
,
February 2005 in “Journal of the American Academy of Dermatology” Focal palmoplantar callosities may help diagnose non-Herlitz junctional epidermolysis bullosa.
5 citations
,
January 1984 in “Journal of psychosomatic obstetrics and gynecology/Journal of psychosomatic obstetrics and gynaecology” The treatment reduced hair growth and testosterone in women with excess hair and had some effects on stress responses.
2 citations
,
June 2025 in “International Journal of Molecular Sciences” Chitosan and melatonin together improve wound healing and have potential in medicine and cosmetics.
October 2012 in “한국미용학회지” For best curls and hair health, use keratin and ceramide after rinsing, or skip rinsing for stable curls.
10 citations
,
July 2023 in “Pharmaceutics” Activating PKM2 and Wnt/β-catenin signaling speeds up wound healing.