3 citations,
November 2021 in “Stress” Girls had higher stress hormone levels during school due to social and emotional issues, while boys had higher overall hormone levels with slight changes when school started.
1 citations,
December 2018 in “IntechOpen eBooks” Human hair shows promise for non-invasive medical testing, but more research is needed to standardize its use.
1 citations,
August 2006 in “International forensic science and investigation series” Hair testing is a reliable method for detecting workplace drug use when done with proper sample preparation and confirmation.
1 citations,
July 2021 in “Forensic science international” Both a lock of hair and a single hair strand can show chronic drug use, but at least six single hairs are needed for accurate results.
July 2022 in “Research Square (Research Square)” Hair analysis can somewhat track past testosterone levels but is influenced by factors like hair washing, growth rate, sex, and hair color.
October 2022 in “Linköping University medical dissertations” The method shows hair testosterone levels reflect those in saliva, but are affected by various factors and may indicate a risk for heart attack.
12 citations,
December 2020 in “Comprehensive psychoneuroendocrinology” Hormone levels in hair change during pregnancy, with progesterone increasing significantly compared to non-pregnant women.
12 citations,
December 2017 in “Scientific reports” The new test can measure very small amounts of testosterone in hair, and grinding the hair up first gives more accurate results.
4 citations,
May 2021 in “Molecules” The hair test for vitamin D could be a useful alternative to blood tests, providing a longer-term vitamin D status, but more research is needed.
1 citations,
October 2023 in “PloS one” Cosmetic hair treatments can increase hair testosterone levels, while natural hair color does not affect it.
September 2023 in “Scientific reports” Segmental hair analysis can track testosterone over time but needs adjustments for sex, hair color, and washing frequency.
December 1991 in “Employment relations today” Hair follicle testing is more reliable and effective for drug screening than urinalysis.
12 citations,
January 2020 in “Analyst” Researchers found markers that can tell if hair has been bleached, which could improve hair test accuracy.
August 2019 in “Journal of archaeological science: Reports/Journal of archaeological science: reports” Ancient hair can preserve hormones, revealing health and fertility insights.
44 citations,
November 2018 in “Journal of applied ecology” Hair analysis for stress and reproductive hormones in wildlife needs more research for accuracy across species.
25 citations,
February 2007 in “Forensic science international” Different hair cleaning methods caused varying levels of damage to the hair's outer layer.
July 2023 in “Current Developments in Nutrition” 
March 2004 in “Journal of The American Academy of Dermatology” Women with lupus experienced non-scarring hair loss with fewer hair follicles, and the test for lupus in hair was not helpful.
July 2023 in “Drug testing and analysis (Print)” Homemade hair treatments can significantly lower drug levels in hair, possibly causing false-negative drug tests.
32 citations,
January 2018 in “American Journal of Clinical Dermatology” Hormone therapy affects hair growth in transgender individuals, with testosterone potentially causing hair loss in trans men and estrogen reducing facial/body hair in trans women; treatment options vary.
January 2019 in “Research Square (Research Square)” The trial will test if YH0618 granule prevents hair loss in breast cancer patients during chemotherapy.
February 2016 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” A hair test can accurately predict if a person with hair loss will respond to minoxidil treatment.
14 citations,
September 2017 in “Proteomics. Clinical applications” Hair protein analysis could improve medical testing and understanding of hair characteristics.
67 citations,
May 2013 in “Therapeutic drug monitoring” Wait 4-5 weeks after drug use before hair testing and cut hair into three segments to confirm single drug exposure.
1 citations,
June 2014 in “Toxicologie analytique et clinique/Annales de toxicologie analytique” Body hair can be used to test for alcohol intake, especially in men.
34 citations,
January 2016 in “Analytical Chemistry” A new method can quickly and accurately detect drugs in hair.
3 citations,
December 2003 in “Micron” The book "Hair Science and Technology" provides a deep understanding of hair biology and genetics, discusses hair growth, density, and diseases, and offers methods for managing hair loss and caring for hair growth.
1 citations,
May 2017 in “InTech eBooks” The document explains the causes, types, diagnosis, and treatments of hair loss, and its psychological impact, especially on women.
July 2024 in “Berkala Ilmu Kesehatan Kulit dan Kelamin” Proper diagnosis and treatment of hair loss in children are crucial to prevent lasting issues and maintain their quality of life.
33 citations,
January 2017 in “Conservation physiology” Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.