January 2022 in “International Journal of Medicine in Developing Countries” Many patients with hair loss had low iron and vitamin D levels, but thyroid issues were not common.
January 1986 in “Journal of Steroid Biochemistry” Women with severe acne, hirsutism, and androgenic alopecia often have higher levels of certain androgens, but the specific pattern can't be predicted just by looking at symptoms.
3 citations
,
December 1968 in “PubMed” Androgenetic alopecia is not caused by low iron levels.
July 2025 in “Humanitarian and Natural Sciences Journal” Low vitamin D and ferritin levels may contribute to hair loss in women.
April 2021 in “Journal of evolution of medical and dental sciences” Women with PCOS have higher levels of certain androgens, which are good at predicting excess hair growth.
21 citations
,
January 2009 in “Indian journal of dermatology, venereology, and leprology” Vitamin B12, folate, ferritin, and iron levels are not linked to alopecia areata.
March 2026 in “Dermatology Reports” Hair iron levels might help increase hair thickness in early hair loss.
5 citations
,
April 2021 in “Journal of Endocrinological Investigation” Higher DHT levels are linked to fewer hypogonadism symptoms in men with normal testosterone levels.
5 citations
,
June 2020 in “Therapeutic drug monitoring” Hair sample weight is a better measure for cortisol levels in hair than hair protein concentration.
May 2024 in “Pakistan Journal of Health Sciences” Iron deficiency is linked to hair loss in CTE patients.
January 2026 in “Journal of the Egyptian Womenʼs Dermatologic Society” High levels of HSP70 and IL-15 are linked to more severe alopecia areata.
6 citations
,
June 2011 in “Journal of The American Academy of Dermatology” Iron deficiency might be linked to hair loss, but more research is needed.
32 citations
,
May 1987 in “The Journal of Clinical Endocrinology & Metabolism” Salivary testosterone is a better measure for hirsutism than serum testosterone.
34 citations
,
July 1999 in “Journal of The European Academy of Dermatology and Venereology” Iron deficiency is not a significant cause of hair loss in women.
April 2023 in “Zenodo (CERN European Organization for Nuclear Research)” Frequent blood transfusions in beta thalassemia patients can lead to thyroid problems.
September 2006 in “Data Archiving and Networked Services (DANS)” Understanding testosterone and estradiol levels is crucial for identifying normal and abnormal hormone levels in men, especially as they age.
18 citations
,
November 2021 in “Skin Appendage Disorders” Women with hair loss may benefit from higher iron levels.
January 2011 in “Journal of Diagnosis and Therapy on Dermato-venereology” Genetics, low estrogen, and low iron levels contribute to female hair loss, with specific scalp signs indicating severity.
13 citations
,
August 2018 in “Clinical Chemistry” Total testosterone levels can help diagnose androgen-producing tumors and hyperandrogenism in women.
March 2003 in “Best Practice & Research Clinical Haematology”
40 citations
,
March 1982 in “British Journal of Dermatology” Young women with diffuse hair loss may have low SHBG levels, which could lead to more active testosterone and contribute to their hair loss.
January 2026 in “Journal of Trace Elements in Medicine and Biology” Dogs have more iron and copper in their hair than cats, and outdoor animals have higher iron levels.
May 2013 in “DOAJ (DOAJ: Directory of Open Access Journals)” Women with hair loss have higher free testosterone levels.
3 citations
,
October 2021 in “Clinica Chimica Acta” Hormone levels in hair vary across the head, with the highest concentration of a key hormone linked to hair loss at the top.
August 2022 in “Our Dermatology Online” The conclusion is that examining the scalp closely and checking for iron levels and thyroid issues is key to understanding chronic hair loss in women.
2 citations
,
September 2012 in “Turk Dermatoloji Dergisi” Low levels of ferritin and vitamin B12 are common in women with telogen effluvium, but the link between nutrient deficiencies and the condition is not clear.
27 citations
,
September 2017 in “Acta dermato-venereologica” Adults with certain skin conditions may have higher levels of inflammation in their body.
December 2014 in “Bali Medical Journal” Females have higher estrogen receptor levels in hair than males, and these levels decrease in white hair compared to black hair.
12 citations
,
June 2006 in “Anais Brasileiros de Dermatologia” The study found average numbers for different types of hair follicles in the scalp and observed differences between men and women, suggesting reasons for more common hair shedding in women.
13 citations
,
March 1962 in “Nature” Carcinoma patients may have lower zinc levels in their hair.