January 2023 in “Figshare” Mouse skin and hair aging starts at 200 days, with changes in hair follicles and more white hairs as signs of aging.
June 2015 in “Reactions Weekly” A man developed alopecia areata after starting cancer treatment with vandetanib.
January 2012 in “Evaluation and Analysis of Drug-Use in Hospitals of China” Finasteride works best for hair loss when started early and is effective for most people.
August 1994 in “Journal of dermatological science” Cyclosporin A and FK506 can start new hair growth in mice, but ascomycin and rapamycin cannot.
March 2023 in “Civil Medical Journal” Androgenetic alopecia in Nepalese men often starts around age 29, with a possible link to COVID-19 worsening the condition.
417 citations,
March 1991 in “American Journal of Psychiatry” Most adult chronic hair pullers are women who started in their early teens, often have other mental health issues, and may pull hair due to underlying psychiatric conditions.
231 citations,
October 1999 in “Journal of Clinical Investigation” Activating the Sonic hedgehog gene in mice can start the hair growth phase.
61 citations,
June 2018 in “Proceedings of the National Academy of Sciences of the United States of America” Light can turn on hair growth cells through a nerve path starting in the eyes.
54 citations,
January 2013 in “BMC Complementary and Alternative Medicine” Thuja orientalis hot water extract may help hair grow by starting the growth phase and improving hair follicle development.
51 citations,
February 2009 in “Journal of dermatological science” Pitx2 helps outer root sheath cells differentiate but can't start hair growth on its own.
50 citations,
March 2001 in “Clinics in dermatology” Human hair is complex and grows in cycles starting from embryonic life.
45 citations,
November 2021 in “Fertility and Sterility” The conclusion is that women under 35 should start fertility checks after 12 months of trying to conceive, women over 35 after 6 months, and women over 40 should start immediately. The checks should include ovulation status, reproductive tract structure, and male partner's semen evaluation.
44 citations,
November 2009 in “Archives of Dermatology” CYLD mutations cause a variety of skin tumors with symptoms starting around age 16, and treatments are currently limited.
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.
37 citations,
August 2009 in “Journal of the American Academy of Child & Adolescent Psychiatry” Trichotillomania is a chronic hair-pulling disorder that starts in early teens and causes distress and hair loss.
34 citations,
September 2019 in “Clinical, Cosmetic and Investigational Dermatology” Light therapy can stimulate hair growth and is more effective when started early, but more research is needed on its long-term effects and optimal use.
33 citations,
May 2018 in “Stem Cell Reports” Krt15+ cells in the mouse intestine resist radiation and can start tumors.
29 citations,
April 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.
28 citations,
November 2012 in “Experimental dermatology” A protein complex called mTORC1 likely affects when hair growth starts in mice.
28 citations,
May 2012 in “Veterinary Dermatology” Different types of dog hair loss are linked to problems starting the hair growth phase and early hair cycle ending.
25 citations,
December 2021 in “Journal of Medical Virology” COVID-19 can cause a type of hair loss that usually starts 74 days after infection, affecting mostly women, but most patients eventually recover.
25 citations,
June 2004 in “Journal of Investigative Dermatology” Macrophage-stimulating protein helps hair grow and can start hair growth phase in mice and human hair samples.
21 citations,
July 2011 in “Journal of the American Academy of Dermatology” A man developed a rash similar to pityriasis rubra pilaris after starting sorafenib for cancer, possibly due to the drug's effect on skin cells.
18 citations,
November 1998 in “Comparative biochemistry and physiology. Part A, Molecular & integrative physiology” Changes in prolactin and DHEA levels are not required for the start of mink hair growth cycles.
12 citations,
June 2005 in “Journal of the European Academy of Dermatology and Venereology” A man with HIV developed skin and hair issues after starting HIV treatment, which improved with topical treatment.
7 citations,
December 2013 in “The Journal of Dermatology” A woman's hair turned gray and fell out after starting a cancer drug called imatinib mesylate.
5 citations,
January 2001 in “Journal of dermatological science” The G(S) alpha subunit gene may help start hair follicle growth in newborn mice.
4 citations,
August 2017 in “International journal of molecular sciences” The conclusion is that Pigmented Epithelioid Melanocytoma can start from hair follicle stem cells or from a mole on the skin.
3 citations,
April 2021 in “Revista da Sociedade Portuguesa de Dermatologia e Venereologia” Some people who got COVID-19 experienced temporary hair loss starting around 10 weeks after infection, with many seeing improvement within about 25 days.
2 citations,
June 2005 in “Clinical Oncology” A man's bald spot grew hair after starting cancer treatment with gefitinib.