January 2018 in “Hair therapy & transplantation” Hair health can indicate mental and general health.
Black sesame oil promotes hair growth and may prevent hair loss.
Hair can show daily calcium changes, linked to body calcium levels and influenced by hormones, and can help assess calcium metabolism issues.
June 2007 in “Nature Clinical Practice Urology” Finasteride for hair loss lowers PSA levels, so PSA values need adjusting when screening for prostate cancer.
January 2004 in “DOAJ (DOAJ: Directory of Open Access Journals)” Men with androgenetic alopecia do not have elevated DHEA-S levels.
November 1982 in “Inpharma” Spironolactone reduces hair growth in women with unexplained excessive hairiness.
Malnourished people have weaker hair that is easier to pluck.
December 2025 in “Zenodo (CERN European Organization for Nuclear Research)” Aloe vera in hair products promotes healthy, strong hair but may cause allergies in some people.
September 2022 in “Journal of The American Academy of Dermatology” Older women taking spironolactone for hair loss may need yearly potassium checks due to a higher risk of hyperkalemia.
December 2021 in “International Journal of Research in Dermatology” Female pattern hair loss in Saudi women is linked to low iron and vitamin D levels.
December 2020 in “The Medical journal of Basrah University” Low vitamin D levels may contribute to female pattern hair loss.
October 2020 in “Clinical and Experimental Dermatology” Hair loss improved after removing pituitary tumor.
August 2019 in “Journal of Dermatology” Woman with diabetes had hair loss due to rare ovarian tumor; surgery improved hair growth.
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.
October 2004 in “DOAJ (DOAJ: Directory of Open Access Journals)” Men with hair loss don't necessarily have higher levels of the hormone DHEA-S, but this hormone tends to decrease with age.
11 citations
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May 2010 in “Journal of Medicinal Chemistry” A new compound was created in 2010 that can control oil production when applied to the skin, and its effects are completely reversible after two weeks.
7 citations
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March 2005 in “International Journal of Cosmetic Science” Menopause reduces hair quality, but hormone therapy can help improve it.
4 citations
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January 2015 in “Endocrinology & metabolic syndrome” Testosterone can cause acne and male-pattern baldness, affects hair growth in men and women, and makes male skin more sensitive.
November 2025 in “Cosmetics” Centella asiatica with growth factors improves hair and scalp health.
May 2023 in “Frontiers in chemistry” Zolpidem shows up in hair from the top back of the head after one dose and fades over time, suggesting it gets into hair through blood and sweat.
June 2014 in “Toxicologie analytique et clinique/Annales de toxicologie analytique” Hair analysis can be unreliable due to external contamination and varying drug concentrations.
128 citations
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January 1996 in “Journal of analytical toxicology.” Hair analysis can detect cocaine use but doesn't accurately show the amount or timing of use.
77 citations
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April 1968 in “Development” Excess vitamin A can cause hair follicles to change into gland-like structures.
50 citations
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September 2011 in “Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids” Maintaining the right amount of retinoic acid is crucial for healthy hair and skin.
18 citations
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April 2009 in “Journal of Chromatography A” Detecting steroid esters in cattle hair is inconsistent and influenced by sampling factors.
12 citations
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February 2006 in “Lipids” Hair texture changes with age due to varying levels of lipids.
12 citations
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October 1981 in “International Journal of Cosmetic Science” Effective anti-dandruff products work well against scalp microbes and stick to the skin.
11 citations
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March 2009 in “Bioorganic & Medicinal Chemistry Letters” Chemicals called 4-(alkylthio)- and 4-(arylthio)-benzonitrile derivatives can potentially reduce oil production on skin, which could help treat conditions like acne and hair loss.
11 citations
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November 2003 in “PubMed” Treatments with certain oils and resins make hair shinier, while zinc oxide and synthetic sebum make it duller.
7 citations
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January 1981 in “Springer eBooks” Certain small molecules and polymers can change hair's physical properties and how it feels by affecting the bonds within the hair.