May 2019 in “The journal of investigative dermatology/Journal of investigative dermatology” Disrupting the Tsc2 gene in certain cells leads to thicker skin, larger hair, and changes in hair growth signaling, which can be partly reversed with specific treatment.
4 citations,
November 1996 in “European journal of endocrinology” Spironolactone may help treat excessive hair growth in girls, but more research is needed.
57 citations,
November 1987 in “Pediatric Dermatology” Children's hair grows in different types from before birth through puberty, with growth rates and characteristics varying by age, sex, and race.
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.
February 2022 in “International journal of research in dermatology” The document concludes that proper diagnosis and treatment of hair shaft disorders require understanding their unique causes and avoiding hair-damaging practices.
103 citations,
November 2014 in “Journal of Cell Biology” MicroRNA-214 is important for skin and hair growth because it affects the Wnt pathway.
29 citations,
May 2020 in “Journal of Tissue Engineering and Regenerative Medicine” The experiment showed that human skin grown in the lab started to form early hair structures when special cell clusters were added.
7 citations,
December 2017 in “Open Access Macedonian Journal of Medical Sciences” Biofibre® hair implants are safe and effective for alopecia when proper procedures are followed, with high patient satisfaction.
1 citations,
October 2018 in “InTech eBooks” The document concludes that treatments for cicatricial alopecia are not well-supported by evidence, but hair transplantation shows more predictable and satisfactory results.
1 citations,
January 1993 in “Facial Plastic Surgery” Surgical hair restoration has improved since 1959, with new techniques like minigrafts, micrografts, and scalp reductions creating more natural hairlines and reducing bald skin, despite some risks and potential for scarring.
7 citations,
December 2021 in “Pharmaceutics” Natural products like plant extracts can help promote hair growth and could be used to treat hair loss.
71 citations,
January 2011 in “Journal of cutaneous pathology” A rare skin condition was confirmed to be associated with a specific virus in a young girl.
61 citations,
July 2012 in “British Journal of Dermatology” Caucasian women's hair appears thickest in their 20s, with perceived thinning after mid-30s due to both decreasing density and diameter.
30 citations,
December 2017 in “Clinical, Cosmetic and Investigational Dermatology” Parietal scalp area has lower hair density and smaller hair diameter in women with hair loss.
9 citations,
April 2017 in “International Journal of Dermatology” Different areas of the scalp have varying hair thickness, useful for different types of hair transplant needs.
6 citations,
May 2006 in “Lupus” People with lupus and rheumatoid arthritis have thinner hair than healthy people.
4 citations,
November 2004 in “Clinical and Experimental Dermatology” Hair length and thickness are related, with thickness peaking at about a quarter of the hair's maximum length.
3 citations,
June 2021 in “Journal of Cosmetic Dermatology” The micrometer caliper is a reliable tool for measuring hair diameter for FUE surgery.
3 citations,
January 2021 in “Hair transplant forum international” The Hair Diameter Index (HDI) was created to help plan hair restoration surgery after finding that visual hair density is linked to hair count and thickness, not volume.
2 citations,
February 2020 in “Journal of Plastic Surgery and Hand Surgery” Good-looking donor sites for hair transplants usually have higher hair density and thicker hair.
23 citations,
July 1989 in “Postgraduate medical journal” Spironolactone did not make hair thinner in women with excess hair growth.
April 2011 in “Global journal of health science” Aldactone effectively reduces hair thickness in women with excessive hair growth, both alone and with other treatments.
March 2021 in “British Journal of Dermatology” PRP helps hair regrowth and thickness.
April 2011 in “Global journal of health science” Spironolactone effectively makes hair shafts thinner in women with excessive hair growth.
16 citations,
January 1989 in “Springer eBooks” Cyproterone acetate effectively treats female hair loss by increasing healthy hair and decreasing unhealthy hair, but doesn't change hair thickness.
November 2022 in “International Journal of Trichology” 
15 citations,
May 1989 in “PubMed” Psoriasis on the scalp causes smaller oil glands and thinner hair but doesn't lead to hair loss.
25 citations,
June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” Phototrichogram and hair diameter measurements are effective, noninvasive ways to assess hair growth and detect early hair loss, with the most common pattern being reduced hair density.
4 citations,
October 2012 in “Archives of Dermatology” Hair diameter diversity is a key sign for diagnosing and managing male pattern baldness.
July 2009 in “Medical & surgical dermatology” Low-dose acitretin helps nail psoriasis, stem cells may treat scarring alopecia, Chinese men have lower baldness rates, lateral foldplasty is good for ingrown toenails, hair diameter helps diagnose female baldness, childhood trauma linked to alopecia areata, certain hair-weaving leads to scalp conditions in African American women, and new methods for hair research and understanding hair and sweat gland development were introduced.