April 2019 in “Journal of Investigative Dermatology” Calcium signals and SHH guide the direction of feather growth in chicken skin.
4 citations
,
August 2017 in “JAMA Dermatology” Norman Orentreich pioneered hair transplantation, improving techniques over time for more natural results.
January 2026 in “Health Food & Biotechnology” A hair serum with 3% keratin from chicken feathers made hair smoother, shinier, and more elastic.
September 2021 in “LAUTECH Journal of Civil and Environmental Studies”
March 2023 in “JAAD case reports” A new genetic change in the keratin 10 gene caused a skin condition called ichthyosis hystrix in a father and his daughter.
September 2020 in “Hair transplant forum international” O'Tar T. Norwood was a key figure in creating a system to classify male baldness and founding hair restoration societies.
57 citations
,
August 1997 in “Microscopy Research and Technique” New molecules involved in skin and hair growth were identified, improving understanding and future treatments.
29 citations
,
January 2021 in “G3 Genes Genomes Genetics” A 195 bp duplication in the HOXC10 gene causes crests in domestic chickens.
6 citations
,
July 2007 in “Developmental Dynamics” The molecule Wise is involved in the development of various structures in chick embryos.
2 citations
,
August 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” Hoxd gene regulation in mammals and birds is robust despite differences in DNA sequences, due to 3D chromatin structures.
1 citations
,
July 2021 in “Current Issues in Molecular Biology” Father's finasteride use may affect son's fertility and testicular function.
6 citations
,
July 2015 in “Journal of Investigative Dermatology” Chicken feather gene mutation helps understand human hair disorders.
103 citations
,
March 2011 in “PLoS Biology” Birds can lose neck feathers due to a genetic change that increases a gene's activity, helping them adapt to heat.
June 2021 in “International journal of research in dermatology” A boy and his father with hereditary hypotrichosis simplex were treated for hair loss, but the treatment result is unknown.
2 citations
,
January 2017 in “International journal of genetics and genomics” Certain miRNAs are linked to chicken feather development.
32 citations
,
October 1985 in “Annals of the New York Academy of Sciences” Keratin genes help explain how hair and feathers develop differently in mammals and birds.
7 citations
,
January 1959 in “Canadian Journal of Chemistry” Human and horse hair have similar end groups to wool and feathers.
November 2025 in “Frontiers in Veterinary Science” A 1.0% tyrosine diet increases melanin in chicken feathers.
158 citations
,
January 2009 in “The International Journal of Developmental Biology” Reptile scales help us understand the evolution of skin features like hair and feathers.
18 citations
,
May 2023 in “Science Advances” Activating the sonic hedgehog pathway in chicken embryos can permanently change scales to feathers.
October 2014 in “Springer eBooks” Rabbit hair fibers are similar to wool and have a hollow center like feathers.
5 citations
,
January 1993 in “PubMed” Retinoic acid can change skin structures in vertebrates, like turning scales into feathers or hair buds into glands.
Retinoic acid can change skin development, like turning scales into feathers or forming glands.
43 citations
,
July 1994 in “Journal of Cell Science” Cross-linked proteins help maintain the structure of hair, feathers, and hagfish teeth.
2 citations
,
September 2008 in “Fertility and Sterility” Adult offspring of sperm donation generally feel positive about their conception and view the donor as their biological father.
72 citations
,
December 2018 in “Journal of Experimental Zoology Part B Molecular and Developmental Evolution” Corneous beta-proteins evolved uniquely in reptiles and birds, forming scales, claws, beaks, and feathers.
18 citations
,
October 2018 in “Journal of The American Academy of Dermatology” Some skin medications can harm male fertility, but they don't seem to cause birth defects from father's exposure.
53 citations
,
September 1999 in “Journal of Synchrotron Radiation” Keratinous tissues have multiple structural layers, including ordered keratin and lipid granules.
6 citations
,
September 1957 in “Poultry Science” Adding copper helps turkey poults grow better when molybdenum is present.
The keratin-based cream effectively repaired and improved damaged hair.