August 2020 in “Ugeskrift for Læger” A man with severe hair loss regrew all his hair using tofacitinib and stayed healthy for a year.
January 2020 in “Turkiye Klinikleri Journal of Dermatology” People with chronic hair shedding had much lower vitamin D levels compared to healthy people.
September 2019 in “Journal of Investigative Dermatology” Apple stem cell extract may increase the number of stem cells in a part of the hair follicle.
January 2019 in “Türkiye klinikleri dermatoloji dergisi” Low levels of iron, ferritin, zinc, and folic acid may contribute to hair loss in women.
April 2018 in “The journal of investigative dermatology/Journal of investigative dermatology” Electrical epilation damages hair follicles and surrounding skin, likely preventing hair regrowth.
December 2021 in “Egyptian Journal of Dermatology and Venereology” Oxidative stress may worsen female pattern hair loss and could help track the disease and treatment.
January 2019 in “Menoufia Medical Journal” Lower vitamin D levels may contribute to female hair loss.
February 2012 in “European Urology Supplements” Finasteride for hair loss may cause long-lasting sexual side effects in young males.
182 citations,
December 2007 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” Hair follicles significantly increase the speed and amount of caffeine absorbed through the skin.
129 citations,
June 1999 in “Archives of Dermatology” African Americans have less hair density than whites.
69 citations,
January 2002 in “Journal of biomedical optics” Dyes can penetrate human skin and hair follicles up to 1.2 mm deep and the sebaceous gland can store dye; Indocyanine Green lotion was made for safe dyeing and monitoring.
62 citations,
January 2013 in “Skin Pharmacology and Physiology” Low iron and vitamin D levels are linked to hair loss in women.
50 citations,
February 2021 in “Physiology & behavior” People with depression often have higher hair cortisol levels, while those with PTSD tend to have lower levels, but more research is needed to understand this fully.
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.
21 citations,
January 2010 in “International Journal of Trichology” TrichoScan often makes mistakes and needs improvement for correct hair growth analysis.
19 citations,
October 2017 in “The FASEB Journal” Male hormones cause different growth in identical human hair follicles due to their unique epigenetic characteristics.
15 citations,
March 1996 in “PubMed” Anorexia nervosa may cause a hair defect called pili torti due to malnutrition and high vitamin A levels.
12 citations,
January 2002 in “Environmental and Molecular Mutagenesis” Smoking reduces antioxidants and causes DNA damage in hair follicles.
11 citations,
February 2019 in “Stem cells international” Skin-derived stem cells grow faster and are easier to obtain than hair follicle stem cells, but both can become various cell types.
11 citations,
January 2014 in “Egyptian Journal of Dermatology and Venereology” Women losing hair might have lower levels of vitamin D.
11 citations,
January 2013 in “Veterinary dermatology” Keratinocytes from dog hair follicles can create a functional skin layer in a lab model, useful for dog skin therapy.
10 citations,
January 2011 in “Journal of biomedical optics” OCT is a reliable, noninvasive way to measure hair thickness.
9 citations,
February 2018 in “Journal of The American Academy of Dermatology” Researchers developed a new method using methylene blue staining to more accurately identify the growth stage of human hair follicles.
7 citations,
June 2021 in “Amino acids” Human hair protein modifications could potentially indicate heart disease risk.
5 citations,
October 2012 in “CMAJ. Canadian Medical Association journal” The girl had harmless hair casts, not lice.
4 citations,
February 2022 in “Journal of Pharmaceutical and Biomedical Analysis” The conclusion is that a new method can measure caffeine and drugs in hair, finding caffeine abusers have 70 times more caffeine than normal, with a proposed cut-off value for abuse.
4 citations,
January 2012 in “Journal of the Egyptian Women's Dermatologic Society (Print)” Women with female pattern hair loss may have a higher risk of developing metabolic syndrome.
3 citations,
January 2021 in “Oxidative Medicine and Cellular Longevity” Nrf-2-modified stem cells from hair follicles significantly improve ulcerative colitis in rats.
3 citations,
January 2020 in “Indian Journal of Dermatology” Certain gene variations in the Vitamin D Receptor are linked to higher risk of female hair loss.
2 citations,
June 2022 in “Scientific reports” Women with PCOS have higher hair cortisol levels, which are linked to worse metabolic and inflammatory conditions.