April 2026 in “Global Journal of Health Science” Micronutrient deficiencies are common in hypothyroidism-related hair loss, so monitoring these nutrients may help manage hair health.
November 2022 in “Journal of Investigative Dermatology” Growth hormone-releasing hormone (GHRH) boosts hair growth and human scalp hair follicles have their own growth hormone system.
6 citations
,
May 2014 in “Biomarkers and Genomic Medicine” Charnoly bodies could be a marker for cell damage, and certain nutrients and proteins might prevent them, potentially helping with brain diseases and cancer.
51 citations
,
September 2020 in “Cell Metabolism” Glutamine metabolism affects hair stem cell maintenance and their ability to change back to stem cells.
70 citations
,
March 2016 in “Urologic Clinics of North America” The document explains how the male reproductive system works, its role in making testosterone, and how conditions like obesity can disrupt it, leading to low testosterone and fertility issues.
65 citations
,
February 2017 in “Pflügers Archiv - European Journal of Physiology” Macrophages are vital for skin healing, hair growth, salt balance, and cancer defense.
July 2025 in “Journal of Investigative Dermatology” Immune system changes may contribute to female pattern hair loss.
January 2022 in “The Egyptian Journal of Hospital Medicine” Higher IL-21 levels may help predict alopecia areata activity.
19 citations
,
January 2018 in “Scientific Reports” Non-immune factors play a significant role in alopecia areata.
October 2022 in “Benha Journal of Applied Sciences” Human Beta Defensin 1 levels do not predict the risk or severity of Alopecia Areata.
90 citations
,
December 2008 in “Journal of Investigative Dermatology” Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
30 citations
,
March 2001 in “Environmental Health Perspectives” Small changes in hormones can significantly impact health, showing the importance of sensitive testing for chemicals that disrupt hormones.
4 citations
,
January 1994 in “Current Opinion in Endocrinology & Diabetes” PTHrP regulates various normal body functions, including bone development, skin, and muscle function.
11 citations
,
January 2015 in “Journal of cellular physiology” HR protein causes abnormal hair cycles by increasing Tgf-β2 and reducing miR-31.
September 1978 in “Journal of steroid biochemistry/Journal of Steroid Biochemistry” 2 citations
,
March 2023 in “3C Empresa Investigación y pensamiento crítico” Alopecia areata patients have higher IFN-γ and low vitamin D3 levels.
10 citations
,
February 2021 in “PLoS biology” Corin helps control salt and sweat release in sweat glands.
December 2025 in “Journal of Investigative Dermatology” Immune system issues may contribute to female pattern hair loss.
November 2022 in “Journal of the Endocrine Society” Immunotherapy for cancer caused a patient to develop a condition affecting hormone production, requiring ongoing hormone replacement therapy.
489 citations
,
June 2005 in “The FASEB Journal” Human hair follicles can produce cortisol like the body's stress response system.
59 citations
,
September 2003 in “Journal of steroid biochemistry and molecular biology/The Journal of steroid biochemistry and molecular biology” Epitestosterone may counteract testosterone's effects and has roles in body processes like prostate growth and hair distribution.
January 2025 in “INTERNATIONAL JOURNAL OF CREATIVE RESEARCH THOUGHTS” September 2025 in “Medicine & Science in Sports & Exercise” Gender-affirming hormone therapy and surgery affect gut bacteria differently.
52 citations
,
February 1986 in “Journal of Histochemistry & Cytochemistry” Some hair proteins are specific to hair, while others are also found in skin cells.
January 2016 in “Journal of animal research” Hair can help assess Copper and Zinc levels in dogs.
9 citations
,
June 2014 in “European Journal of Obstetrics & Gynecology and Reproductive Biology” Blood AMH levels are higher in women with PCOS than in those with other similar conditions.
13 citations
,
September 2020 in “Sensors” Hair follicles have a pH gradient, increasing towards the root.
February 2026 in “iScience” Hair metal analysis may help diagnose Parkinson's disease and suggests gut involvement.
4 citations
,
January 1981 in “PubMed” Hair medullary cells in mammals vary in complexity, with humans having more structured cells similar to inner root sheath cells.
32 citations
,
May 2012 in “PloS one” Thymic transplantation normalized some T-cells but not others, maintaining immune function.