February 2021 in “Journal of Investigative Dermatology” Hair loss in male pattern baldness is linked to changes in specific genes and proteins that affect hair growth and scalp health.
January 2003 in “Elsevier eBooks” Androgens and other hormones affect hair growth and skin conditions like acne.
20 citations
,
January 2017 in “Experimental Dermatology” Igf1r helps regulate hair growth cycles.
28 citations
,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” 21 citations
,
June 2004 in “Experimental Dermatology” Ber‐EP4 marks cells related to the secondary hair germ in hair follicles.
September 2025 in “Skin Research and Technology” The "sinuskissen" in cat hair follicles is mostly connective tissue, affecting fluid flow.
2 citations
,
May 2012 in “Acta pharmaceutica sinica B” The study found unique microscopic features for hair or feather in five animal ingredients in Shenrongbian pill.
Frontal hair in male pattern baldness shows reduced growth and thickness.
28 citations
,
August 2013 in “Facial Plastic Surgery Clinics of North America” Body and beard hair can be used for hair restoration in severely bald patients, but the technique is complex and costly.
1 citations
,
April 2019 in “PubMed” The medulla in Asian scalp hair has a tubular structure that allows ions and large molecules to flow through it.
2 citations
,
January 2022 in “Skin research and technology” OCT can detect hidden hair follicles in alopecia areata, indicating potential hair regrowth.
11 citations
,
February 1980 in “BMJ. British medical journal” Hirsutism is common body hair growth due to genetics and hormones, and while not a disease, it can be distressing; virilisation includes hirsutism with other male traits and needs medical attention.
44 citations
,
August 1990 in “PubMed” Keratins K1 and K10 are found in the inner root sheath and cuticle of human hair follicles.
33 citations
,
January 2014 in “Pediatric Research” 
January 2023 in “Operative Techniques in Otolaryngology-Head and Neck Surgery” Hair transplants help transgender patients look more like their gender identity, with different procedures for trans women and men.
195 citations
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May 2003 in “Obstetrics and gynecology (New York. 1953. Online)/Obstetrics and gynecology” Most women with excess hair growth have an underlying hormonal issue, often treated with medication and hair removal methods.
May 2026 in “Zenodo (CERN European Organization for Nuclear Research)” Natural hair is a return to its original state, while modifications signal social pressures.
December 2025 in “ILDS-DEV” Understanding hair follicle interactions can help treat male pattern baldness.
73 citations
,
July 1956 in “Journal of Investigative Dermatology” Adult human skin can grow new fine hair follicles after a deep exfoliation treatment.
15 citations
,
December 2014 in “PLoS ONE” A mutation in the iRhom2 gene causes hairless mice due to abnormal hair follicle development.
August 2013 in “International Wound Journal” Non-hairy skin cells might be used to regenerate hair, helping with baldness and skin wounds.
3 citations
,
February 2023 in “Journal of Cosmetic Dermatology” Hirsutism greatly impacts women's mental well-being and finances.
6 citations
,
January 2013 in “Journal of Cutaneous and Aesthetic Surgery” A man with baldness had successful hair growth after transplanting body hair to his head.
1 citations
,
January 2024 in “Annals of Dermatology” Examining hair shape can help predict Alopecia Areata's progression.
12 citations
,
December 2021 in “Aging” A new painless method to collect hair follicles helps study DNA damage and aging.
37 citations
,
August 1999 in “Journal of Investigative Dermatology” A specific gene mutation causes complete hair loss without other health issues.
28 citations
,
March 2000 in “Obstetrics and gynecology clinics of North America” Hirsutism in teen girls is common, usually harmless, but can sometimes signal serious issues and is treatable.