151 citations
,
August 2010 in “British Journal of Dermatology” Guidelines for diagnosing common hair loss include detailed history, clinical examination, and various diagnostic techniques.
4 citations
,
November 2020 in “BMC Dermatology” Researchers identified genes in scalp hair follicles that may affect hair traits and hair loss.
2 citations
,
December 2019 in “Journal of Dermatological Treatment” Metabolic syndrome reduces effectiveness of hair loss treatment.
22 citations
,
May 1986 in “Clinics in endocrinology and metabolism” Certain finger length ratios and body hair patterns may predict side effects from birth control pills in women.
19 citations
,
April 2015 in “European Journal of Pharmacology” Dihydrotestosterone (DHT) doesn't affect rat skin cell growth, but it does change cell cycle, protein levels, and other cell functions, potentially shortening hair growth cycle.
January 2001 in “대한피부과학회지” Hormone levels in women with androgenetic alopecia are similar to those without the condition.
December 2019 in “Periodicals of Engineering and Natural Sciences (PEN)” Hair analysis can provide insights into a person's medical history and location over time.
31 citations
,
December 2017 in “Skin Appendage Disorders” Caucasians have the highest hair density, followed by Hispanics, with the lowest in individuals of African descent.
May 2017 in “Chinese Journal of Dermatology” Alopecia negatively affects quality of life and mental health.
3 citations
,
June 2021 in “Journal of affective disorders” Hair cortisol and cortisone levels may affect how work stress influences depression in Chinese fishermen.
December 2022 in “The Aging Male” Lower 2D:4D ratio and older age increase the risk of severe hair loss in men.
16 citations
,
May 2020 in “Psychoneuroendocrinology” People with Parkinson's disease have higher levels of cortisone in their hair, which may indicate chronic stress hormone dysfunction.
December 2004 in “Medicine” A thorough history and examination are crucial for diagnosing skin diseases, which affect up to a third of people. This includes details about skin lesions, medication, general health, lifestyle, family, and contacts, as well as examining the rash, hair, nails, and mucous membranes. Changes in hair and nails can also indicate other medical and skin disorders.
April 2023 in “Cancer Research” Plucked hair can effectively monitor drug effects in cancer treatment.
2 citations
,
June 2012 in “Journal of Dermatological Science” The gene HDC is important for the development of hair follicles in newborn mice.
September 2024 in “Turkish Journal of Dermatology” A lower second to fourth finger length ratio may predict male alopecia areata.
90 citations
,
July 2014 in “Conservation Physiology” Hair cortisol levels in brown bears can be affected by both long-term and short-term stress.
9 citations
,
September 2022 in “Frontiers in Physics” The technique accurately identifies and evaluates hair follicle structures in skin.
8 citations
,
August 2018 in “Anais Brasileiros De Dermatologia” Portuguese WAA-QoL questionnaire validated; FPHL severity, schooling, and phototypes affect patients' quality of life.
October 2021 in “International Journal of Research in Dermatology” People with alopecia areata often have low vitamin D levels, which may worsen their hair loss.
2 citations
,
February 2017 in “International Journal of Molecular Sciences” Erdr1 could be a new marker for diagnosing hair loss.
November 2025 in “Communications Biology” Human hair contains many different molecules that change along its length, influenced by personal care products.
11 citations
,
August 2000 in “Journal of Endocrinology” DHEA acts like a male hormone on rat skin glands and doesn't turn into female hormones there.
13 citations
,
March 2020 in “Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy” Alopecic hair has more irregular structures and chemical changes than normal hair, reducing its strength.
14 citations
,
November 2012 in “SLAS discovery” Some herbal extracts can promote hair growth and prevent hair loss.
January 2026 in “International Journal of Dermatology” The new tool helps measure the impact of alopecia areata on children's quality of life.
1 citations
,
September 2003 in “Annals of Epidemiology”
2 citations
,
January 2007 in “Journal of Fashion Business” Most people with hair loss haven't used treatment products and are only somewhat satisfied with their options, highlighting a need for better management programs and marketing.