October 1890 in “Science” Pilocarpin can cause hair regrowth and color change in some cases but not in others, and it may have side effects in animals.
15 citations
,
January 2016 in “Przeglad Menopauzalny” Eating a balanced diet with specific nutrients is important for menopausal women to manage hair loss.
304 citations
,
July 2006 in “Journal of The American Academy of Dermatology” Videodermoscopy improves diagnosis of hair and scalp disorders and may reduce scalp biopsies.
66 citations
,
June 2018 in “International Journal of Women's Dermatology” No cure for female pattern hair loss, but various effective treatments exist.
53 citations
,
January 2009 in “Journal of Investigative Dermatology” UVB radiation harms hair growth and health, causing cell death and other changes in human hair follicles.
40 citations
,
January 2010 in “International Journal of Trichology” Loose Anagen Syndrome is a hair condition where hairs can be easily pulled out, mainly affecting young girls, and may improve on its own or with treatment.
37 citations
,
February 2014 in “Journal of Dermatology” Valproic acid increases hair count in men with hair loss.
22 citations
,
July 2019 in “PLOS ONE” Skin lymphatic vessels are essential for hair growth.
19 citations
,
January 2015 in “Current problems in dermatology” Ultraviolet rays damage hair, smoking may cause hair loss, and good nutrition is important for hair health, but genetics mainly decide hair thickness.
8 citations
,
September 1958 in “Acta pathologica et microbiologica Scandinavica” Certain treatments can speed up local hair growth in mice but don't change the overall hair growth pattern.
July 2016 in “Indian journal of science and technology” Neonate scalp hair is thinner, lacks a medulla, and has smaller follicles compared to adult hair.
116 citations
,
May 2013 in “Proceedings of the National Academy of Sciences of the United States of America” Hair grows faster in the morning and is more vulnerable to damage from radiation due to the internal clock in hair follicle cells.
98 citations
,
October 2012 in “Dermatologic Clinics” Eating the right nutrients can improve hair health, but taking extra supplements usually doesn't help unless you have a deficiency.
3 citations
,
November 2018 in “Curēus” The cause and importance of misplaced oil glands in the hair follicle are not well understood.
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.
12 citations
,
June 2013 in “The American Journal of Dermatopathology” A new method using visual aids to diagnose hair diseases was effective after brief training.
101 citations
,
January 1997 in “Journal of Investigative Dermatology Symposium Proceedings” Nerves and chemicals in the body can affect hair growth and loss.
12 citations
,
September 2018 in “International Journal of Cosmetic Science” Palmitoyl tetrapeptide-20 may help reduce hair greying and increase melanin production.
January 2017 in “Clinical approaches and procedures in cosmetic dermatology” Cosmetic procedures can harm hair, but damage can be minimized with knowledge and care; however, once hair is damaged, it cannot be reliably repaired.
January 2011 in “Springer eBooks” Eating a balanced diet with the right vitamins and minerals is important for healthy hair, but too many supplements can be harmful.
277 citations
,
June 2003 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” Epithelial-mesenchymal interactions control hair growth cycles through specific molecular signals.
19 citations
,
October 2017 in “The FASEB Journal” Male hormones cause different growth in identical human hair follicles due to their unique epigenetic characteristics.
77 citations
,
March 2021 in “Nature” Stress hormone corticosterone blocks a growth factor to slow down hair stem cell activity and hair growth.
December 2025 in “Frontiers in Veterinary Science” Key genes like KRT27 and IGF-2 are crucial for hair follicle development in Qianhua Mutton Merino sheep.
520 citations
,
February 2001 in “Journal of Clinical Investigation” VEGF helps hair grow and determines follicle size by increasing blood vessel growth.
223 citations
,
January 2014 in “International Journal of Molecular Sciences” The conclusion is that proper signaling is crucial for hair growth and development, and errors can lead to cancer or hair loss.
209 citations
,
September 2008 in “Dermatologic Therapy” Androgens can both increase and decrease hair growth in different parts of the body.
157 citations
,
April 1994 in “Clinical endocrinology” Androgens can cause hair growth in some areas and hair loss on the scalp.
87 citations
,
April 2018 in “Biochemical and Biophysical Research Communications” Exosomes from dermal papilla cells can help grow hair and might treat hair loss.
87 citations
,
March 2011 in “Australasian Journal of Dermatology” Genetics and hormones play a role in male and female hair loss, but more research is needed to fully understand it.