40 citations
,
December 2011 in “British Journal of Dermatology” Women's hair generally gets thinner and less dense starting in their mid-thirties, with hair loss becoming more common as they age due to both genetics and environment.
26 citations
,
March 1986 in “Clinical and Experimental Dermatology” Scalp hair grows at 0.37 mm/day, forearm hair at 0.18 mm/day, and thigh hair at 0.30 mm/day, with no significant differences found in people with certain hair conditions.
24 citations
,
September 2002 in “Dermatologic Surgery” The place where hair is transplanted can affect its growth and survival rates.
July 2018 in “Elsevier eBooks” The most common cause of hair loss in children is tinea capitis, followed by alopecia areata and telogen effluvium.
59 citations
,
July 2015 in “Journal of innovative optical health sciences/Journal of innovation in optical health science” Nanoparticles around 600-700 nm can effectively enter and stay in hair follicles for days, which may help in delivering drugs to specific cells.
51 citations
,
September 2020 in “Cell Metabolism” Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.
47 citations
,
July 1967 in “Science” Not eating enough protein can cause hair roots to shrink and lose color, and hair to become thinner.
39 citations
,
April 2020 in “Clinical, Cosmetic and Investigational Dermatology” Asian hair is generally straight and thick, with unique disorders and properties, and more research is needed to understand it fully.
20 citations
,
May 2020 in “Experimental Dermatology” Aging scalp skin contributes to hair aging and loss, and more research is needed to develop better hair loss treatments.
18 citations
,
November 2010 in “Journal of morphology” Antler velvet hair and body hair of red deer have different structures that help with protection and insulation.
14 citations
,
July 2015 in “Journal of Cosmetic Dermatology” Sebaceous glands in male pattern hair loss patients have more lobules and might cause early hair growth phase shifts.
13 citations
,
July 2016 in “BMC Complementary and Alternative Medicine” Hominis Placenta helps hair grow back by increasing cell growth and a specific growth factor.
10 citations
,
January 2021 in “Journal of Ginseng Research” Red ginseng oil may help grow hair and protect skin from UVC light.
7 citations
,
January 2010 in “Animal” Angora goat hair grows faster and produces more protein than cashmere goat hair, and certain hormones and nutrients positively affect hair growth and protein synthesis.
3 citations
,
June 2017 in “Journal of Biomaterials Applications” Keratin extract from human hair was found to promote hair growth in mice.
November 2024 in “Journal of Translational Internal Medicine” Exosomes from stem cells help hair regrowth by activating a specific signaling pathway.
September 2022 in “Canadian journal of animal science” Certain gene variations are linked to the thickness of cashmere goat hair.
Biotin boosts wool growth and follicle health in sheep.
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.
August 2025 in “Journal of the Korean Society of Cosmetology” Scalp and hair research in Korea has become more diverse and interdisciplinary, focusing on practical applications.
520 citations
,
February 2001 in “Journal of Clinical Investigation” VEGF helps hair grow and determines follicle size by increasing blood vessel growth.
73 citations
,
March 2009 in “Seminars in Cutaneous Medicine and Surgery” The document concludes that accurate diagnosis of hair disorders is crucial and requires a range of diagnostic methods.
1 citations
,
December 2018 in “Journal of Cosmetic Dermatology” Men with thinner hair from genetic hair loss may be more likely to have an enlarged prostate.
January 2019 in “Springer eBooks” PRP may help with hair loss and improve hair quality with few side effects, but more research is needed.
July 2018 in “Elsevier eBooks” New hair loss treatments show promise, but more research is needed to confirm their effectiveness.
January 2014 in “Journal of Pigmentary Disorders” Women's hair gets thinner and grayer as they age, with treatments available for hair loss and graying.
1113 citations
,
August 1999 in “The New England Journal of Medicine” Hair follicle biology advancements may lead to better hair growth disorder treatments.
38 citations
,
January 2015 in “Journal of Cosmetic Dermatology” The nutritional supplement improved hair density and reduced hair loss in women with female pattern hair loss.
24 citations
,
August 2011 in “Experimental Dermatology” The flap assay grows the most natural hair but takes the longest, the chamber assay is hard work but gives dense, normal hair, and the patch assay is quick but creates poorly oriented hair with some issues.
16 citations
,
April 2021 in “International Journal of Molecular Sciences” Micro-current stimulation may promote hair growth more effectively than standard treatments.