23 citations
,
July 1989 in “Postgraduate medical journal” Spironolactone did not make hair thinner in women with excess hair growth.
10 citations
,
January 2009 Collagen XVIII affects wound healing, hair growth, and bone development, with its absence speeding up processes and overexpression causing delays and abnormalities.
9 citations
,
October 2018 in “Journal of Cosmetic Dermatology” Isotretinoin at a low dose for three months does not significantly affect hair growth.
5 citations
,
May 2021 in “Veterinary medicine and science” Injecting cosyntropin into grizzly bears increases blood cortisol but doesn't change hair cortisol levels.
1 citations
,
July 2023 in “Journal of Clinical Medicine” Different causes of beard hair loss have various treatments, including medications, lifestyle changes, and procedures to stimulate hair growth.
July 2020 in “Family Medicine” Diffuse hair loss can signal health issues like iron deficiency, and a new supplement, Richter FerroBio, may help improve hair growth.
January 2010 in “Computerized Tomography Theory and Applications” Dermoscopy image analysis is a simple, effective way to evaluate hair growth and product efficacy.
July 2012 in “EFSA supporting publications” The EFSA maintained its view that spermidine's effect on hair growth is related to disease treatment and does not meet the health claim criteria.
Ocu-miR-205 affects hair density in Rex rabbits by promoting cell changes and influencing hair follicle phases.
November 2023 in “Frontiers in cell and developmental biology” Hair aging is caused by stress, hormones, inflammation, and DNA damage affecting hair growth and color.
December 2022 in “International Journal of Health Science” High levels of male hormones in women with PCOS can lead to fertility issues and symptoms like irregular periods, hair growth, acne, and hair loss; lifestyle changes are recommended for management.
October 2019 in “UNESP Institutional Repository (São Paulo State University)” Oral minoxidil 1 mg is effective and safe for female hair loss, with less shedding but more hair growth on the body.
150 citations
,
August 1992 in “Genes & Development” TNF alpha in skin cells causes weight loss, hair and fat issues, and skin inflammation in mice.
September 2023 in “Cells tissues organs” Mice skin matures by day 200, leading to aging signs like curved hair follicles and white hairs due to changes in skin stem cells.
2 citations
,
September 2025 in “BMC Genomics” Maize root hairs adapt differently to mild and severe cold, with mild stress allowing some growth and severe stress stopping growth to focus on defense.
1 citations
,
May 2017 in “InTech eBooks” Hair loss in Androgenetic alopecia (AGA) is due to altered cell sensitivity to hormones, not increased hormone levels. Hair growth periods shorten over time, causing hair to become thinner and shorter. This is linked to miscommunication between cell pathways in hair follicles. There's also a change in gene expression related to blood vessels and cell growth in balding hair follicles. The exact molecular causes of AGA are still unclear.
August 2024 in “International Journal of Medicine” COVID-19 can cause hair loss, and managing it involves counseling, diet changes, and treatments.
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.
2 citations
,
January 1984 in “Progress in neuro-psychopharmacology & biological psychiatry” Benzodiazepines changed hormone levels but did not affect hair growth in women with idiopathic hirsutism.
Neuropeptides affect hair growth and could be used to control it.
9 citations
,
January 1998 in “Studia Anglica Posnaniensia: international review of English Studies” Wound-induced hair growth may help study regeneration and aging, but it's unclear if this ability decreases with age.
January 1995 in “Skin Cancer” The outer root sheath in hair follicles changes during growth, with different keratinization processes in its layers.
11 citations
,
April 1990 in “Australasian Journal of Dermatology” Minoxidil modestly increases hair growth in men with early baldness and is safe to use.
5 citations
,
June 2011 in “PLoS ONE” Mammoth hair grew faster than human hair and showed seasonal changes in growth and mineral content.
October 2021 in “Technology transfer: innovative solutions in medicine” The combined treatment improved scalp health in women with early-stage hair loss.
24 citations
,
May 2010 in “Hautarzt” Different hormones affect hair growth and conditions, with some causing hair loss and others promoting it.
20 citations
,
January 2017 in “Scientific reports” Whale genes show changes that help them live in water, like less hair and better flippers.
18 citations
,
June 1988 in “Culture, medicine and psychiatry” The perception of excessive hair growth in women as abnormal is more influenced by cultural norms than by medical reasons.
7 citations
,
January 2019 in “Pharmaceutical Biology” Eclipta prostrata helps hair growth and maintains the growth phase by affecting certain growth factors.
5 citations
,
March 1981 in “PubMed” A girl grew extra hair in areas where she had insect bites.