506 citations
,
March 2005 in “The Journal of Clinical Endocrinology and Metabolism” Testosterone therapy improves physical function, strength, and body composition in older men with low testosterone levels.
6 citations
,
November 1997 in “International Journal of Dermatology” Women with acne and irregular periods had higher active testosterone levels, which could suggest the usefulness of antiandrogen treatment.
June 2019 in “Journal of Akhtar Saeed Medical & Dental College” Prolactin levels are higher in women with hirsutism but don't relate to its severity.
March 2014 in “Journal of The American Academy of Dermatology” Vitamin D deficiency is common in temporary hair loss, and stress is often a suspected cause.
5 citations
,
May 2018 in “Journal of the American Academy of Dermatology” Lower vitamin D levels might be linked to more severe alopecia areata, but more research is needed to understand if vitamin D can help treat it.
29 citations
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March 2010 in “Journal of Endocrinological Investigation” Lipocalin-2 levels are higher in women with PCOS and may indicate insulin resistance.
1 citations
,
October 2020 in “Journal of Cosmetic Dermatology” Possible link between hair loss and metabolic syndrome, with RANTES as a potential clue.
January 2026 in “International Journal of Pharmaceutical Quality Assurance” Alopecia Areata patients have low zinc and high copper levels.
January 2024 in “Journal of the Endocrine Society” The research found that measuring androgens in urine can give extra information about body metabolism and is linked to androgen levels in the blood, especially in young girls.
February 2022 in “Global academic journal of medical sciences” People with alopecia areata have much lower Vitamin-D levels than healthy individuals.
January 2012 in “Vitamins & trace elements” Smoking and drinking can lower vitamin levels and potentially trigger early hair loss, but overall vitamin levels don't seem to affect hair loss duration.
78 citations
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August 2012 in “Human molecular genetics online/Human molecular genetics” A new gene, JMJD1C, may affect testosterone levels in men.
56 citations
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January 2008 in “Dermatology” Higher iron levels in the blood are not linked to increased hair loss in women.
10 citations
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May 2017 in “PLOS ONE” Men and premenopausal women in Korea show different patterns in iron and vitamin D levels, with no clear pattern for postmenopausal women.
7 citations
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August 2017 in “European Journal of Obstetrics & Gynecology and Reproductive Biology” Lower vaspin levels in the blood may indicate a better response to fertility treatment in women with PCOS.
7 citations
,
January 2017 in “Journal of Clinical Biochemistry and Nutrition” Higher vitamin D levels are linked to higher iron levels in Korean women without metabolic syndrome, but not in those with it.
3 citations
,
January 2017 in “Journal of Pakistan Association of Dermatology” Women with certain types of hair loss may have low iron levels, and iron supplements could help.
April 2025 in “Egyptian journal of Immunology” Calprotectin levels are higher in alopecia areata patients, indicating systemic inflammation.
January 2025 in “International Journal of Dermatology Venereology and Leprosy Sciences” People with acne tend to have lower iron levels.
Wildebeest stress and hormone levels are influenced by food availability, human presence, and reproductive cycles.
417 citations
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February 2004 in “The Journal of Clinical Endocrinology and Metabolism” Testosterone therapy increases bone density in older men with low testosterone levels.
65 citations
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January 2009 in “Annals of Dermatology” Zinc supplements increased zinc levels in some hair loss patients but didn't significantly improve hair growth.
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.
21 citations
,
January 2014 in “Dermatology Research and Practice” Hair and serum levels of zinc, copper, and iron are similar in people with alopecia areata and healthy individuals.
4 citations
,
January 2015 in “Journal of microbial & biochemical technology” Biotin helps regulate proteins in the blood, which may explain its role in hair growth.
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.
November 2022 in “SAS journal of medicine” There's no link between low iron levels and the hair loss condition, alopecia areata.
July 2022 in “Al-Mağallaẗ al-ʻirāqiyyaẗ li-l-ṣaydalaẗ” Lower zinc levels are linked to more severe hair loss in alopecia areata.
September 2018 in “International Journal of Dermatology” People with alopecia areata often have lower levels of zinc and vitamin D.
April 2007 in “Nature Clinical Practice Urology” Finasteride lowers PSA levels about the same whether taken at 1 mg or 5 mg daily.