January 2017 in “Journal of cosmetology & trichology” A man with severe hair loss regrew hair after hormone treatment.
Low-level laser therapy combined with Neoptide improved hair regrowth better than either treatment alone in rats.
416 citations
,
September 1997 in “Journal of Investigative Dermatology” People with hair loss have more androgen receptors and enzymes in certain follicles, with men and women showing different patterns.
1 citations
,
November 2011 in “Dermatologica Sinica” Women using hair relaxers with alopecia had lower zinc levels, suggesting zinc deficiency might contribute to hair loss.
January 2012 in “Human health handbooks” Low-level light therapy is FDA-approved for male pattern hair loss, increases hair count and strength, and is considered safe for use.
87 citations
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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.
57 citations
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November 2006 in “International Journal of Cancer” A49T gene variant linked to higher prostate cancer risk, lower hormone levels, and slightly reduced balding risk.
23 citations
,
August 2017 in “Scientific Reports” Darker hair may lead to higher cortisol readings, suggesting a need to adjust for hair color in studies.
January 2024 in “Institutional Repositories DataBase (IRDB)” The method accurately measures steroid hormones in hair to study hormone dynamics related to hair loss.
January 2023 in “Zdravstvena zaštita” Aging-related hormone changes affect voice quality, especially during puberty, menstruation, pregnancy, and menopause.
January 2016 in “Journal of SAFOG” Girls with PCOS and menstrual disorders have notably higher androgen hormone levels.
52 citations
,
May 2003 in “The journal of investigative dermatology/Journal of investigative dermatology” Parathyroid hormone-related protein helps control hair growth phases in mice.
37 citations
,
March 2014 in “Journal of Trace Elements in Medicine and Biology” Lower hair zinc and copper levels found in Turkish males with hair loss; higher BMI linked to less hair zinc.
9 citations
,
July 2014 in “Experimental Dermatology” PTHRP agonists can stimulate hair growth, especially in damaged follicles, while antagonists may initially increase growth but ultimately inhibit it.
4 citations
,
April 2020 in “Journal of Cosmetic Dermatology” Low vitamin D levels are linked to different types of hair loss.
1 citations
,
August 2023 in “Cutis” Low ferritin levels can indicate iron deficiency as a cause of hair loss.
July 2025 in “International Journal of Dermatology Venereology and Leprosy Sciences” Higher stress levels may worsen alopecia areata, suggesting stress management is important for treatment.
165 citations
,
August 2013 in “Lasers in Surgery and Medicine” Low-Level Laser Therapy is effective and safe for hair growth with minimal side effects.
56 citations
,
January 2008 in “Dermatology” Higher iron levels in the blood are not linked to increased hair loss in women.
22 citations
,
September 2014 in “Veterinary Dermatology” Low-level laser therapy seems to help dogs with noninflammatory alopecia grow hair back.
April 2019 in “Journal of Investigative Dermatology” Low-level laser therapy helps hair growth and reduces hair loss with few side effects.
35 citations
,
December 2009 in “Human reproduction” Metformin taken during pregnancy increases SHBG in newborns but doesn't change other hormone levels in mothers or babies.
28 citations
,
September 2017 in “Gynecological Endocrinology” Women with PCOS have higher levels of AMH in their blood and follicles, and this can help predict their risk of overreaction to fertility treatments.
5 citations
,
February 2016 in “Genetic Testing and Molecular Biomarkers” Hair loss is significantly linked to lower levels of certain genes in hair follicles.
18 citations
,
February 2012 in “Experimental Dermatology” No link found between specific genes and female pattern hair loss.
24 citations
,
May 2017 in “Journal of Cosmetic and Laser Therapy” The laser scanner device was more effective at increasing hair density than the laser hat in treating androgenic alopecia.
November 2020 in “Acta Scientific Women's Health” Low vitamin D levels can significantly contribute to hair loss, especially in women aged 35-45. Correcting these levels early may help prevent and treat this condition.
15 citations
,
April 2022 in “Ginekologia Polska” Higher thyroid hormone levels may be linked to certain types of polycystic ovary syndrome.
4 citations
,
January 1994 in “Journal of hepatology” Cyclosporine A therapy changes sex hormone levels differently in pre-menopausal and post-menopausal women with primary biliary cirrhosis.
227 citations
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January 1998 in “Journal of Endocrinology” Cells from balding scalps have more androgen receptors than cells from non-balding scalps.