Hedgehog signaling can create new hair follicles but may also cause tumors.
9 citations
,
January 2005 in “Experimental dermatology” Melatonin receptors in hair follicles help regulate hair growth and could treat hair loss.
26 citations
,
October 1996 in “Journal of Endocrinology/Journal of endocrinology” Goat hair follicles have insulin-like growth factor-I receptors that might affect hair growth, but no melatonin receptors were found.
521 citations
,
January 1954 in “Physiological Reviews” Hair growth is cyclic and influenced mainly by local factors.
April 2018 in “Journal of Investigative Dermatology” Arrector pili muscle regulates hair follicle stem cells, DNA methylation needed for hair cycling, and Wnt/B-catenin signaling starts hair growth.
176 citations
,
September 2006 in “Stem Cells” BMP signaling prevents hair growth by stopping stem cell activation.
Stress can cause hair loss and trigger autoimmunity by damaging hair follicle cells.
41 citations
,
November 2003 in “Annals of the New York Academy of Sciences” Male hormones, or androgens, affect women's health in areas like mood and bone density, and hormone replacement therapy using antiandrogenic progestogens can improve mood disorders and alertness in menopausal women.
March 2021 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” Fat tissue around hair follicles releases a growth factor that helps hair grow and develop color.
April 2022 in “Journal of The American Academy of Dermatology” The document suggests that nerve issues might contribute to hair loss and that testing sensation could predict these nerve problems.
15 citations
,
May 2002 in “PubMed” Hormones, especially DHT, affect hair loss and growth, and targeting specific enzymes may help treat hair loss.
1 citations
,
November 2022 in “Diagnostics” A woman with a rare hormone resistance condition also had missing teeth and hair loss, which might be new symptoms of her genetic disorder.
46 citations
,
November 2014 in “The Journal of Clinical Endocrinology & Metabolism” Men with isolated hypogonadotropic hypogonadism have partial steroid deficiencies, while those with panhypopituitarism have severe deficiencies.
January 2015 in “Journal of clinical & experimental dermatology research” A protein combining parathyroid hormone and collagen helped hair regrow in mice with a hair loss condition.
1 citations
,
May 2024 in “PubMed” Dermal fat helps control hair growth, but more research is needed.
3 citations
,
May 2002 in “PubMed” The document concludes that treatment for excessive hair growth depends on the cause, with options including hair removal methods and medications like anti-androgens or insulin-sensitizing drugs.
136 citations
,
June 2006 in “Journal of Dermatological Science” PDGF isoforms can promote and sustain hair growth.
September 2025 in “International Journal of Science and Research (IJSR)” Stress causes hair loss by disrupting hair growth cycles, and combining medical and cosmetic treatments can help manage it.
24 citations
,
November 2019 in “Experimental Dermatology” PPAR-γ is important for healthy hair and its problems, and more research on PPAR-γ treatments is needed.
36 citations
,
April 2016 in “Biochimie” A substance called epidermal growth factor helps increase the growth of important hair follicle cells by activating a specific cell communication route.
2 citations
,
May 2001 in “Current problems in dermatology” The conclusion is that effectively treating hair disorders is difficult due to the complex factors affecting hair growth and more research is needed to improve treatments.
11 citations
,
July 2015 in “Gene” DHT affects bone growth by altering gene activity in osteoblasts, potentially complicating steroid use.
December 2017 in “International Journal of Current Research in Biosciences and Plant Biology” Nutrients and hormones affect root hair growth, but more research is needed to understand the genetic mechanisms.
49 citations
,
April 1997 in “Human reproduction” Hormone therapy for excessive hair growth is as good with GnRHa as with high-dose CPA, but GnRHa has longer-lasting results.
4 citations
,
January 1991 in “Journal of dermatological treatment” Goserelin and oestradiol treatment slightly improved hairiness but did not significantly change sebum production or hair characteristics in mildly hirsute women.
January 2026 in “International Journal of Homoeopathic Sciences” Homeopathic treatment improved thyroid function and well-being in a woman with hypothyroidism.
18 citations
,
June 2016 in “PeerJ” Testosterone increases certain kidney protein levels, potentially raising blood pressure.
May 2023 in “Animal Reproduction Update” High levels of cortisol in hair show long-term stress which can lower fertility in animals.
114 citations
,
October 1996 in “Dermatologic clinics” Hair loss is mainly caused by hormones, autoimmune issues, and chemotherapy, and needs more research for treatments.