11 citations
,
September 1999 in “Biological Trace Element Research” Mineral deficiencies in pregnant women can be improved with proper supplementation.
October 2023 in “Èkologiâ čeloveka” People in Moldova have less selenium in their hair than recommended, which may contribute to hair loss.
Hair and nails can show hormone changes during puberty in dogs.
July 2023 in “Drug testing and analysis (Print)” Homemade hair treatments can significantly lower drug levels in hair, possibly causing false-negative drug tests.
122 citations
,
October 2010 in “Clinica Chimica Acta” Washing hair with water or shampoo lowers cortisol levels in hair.
22 citations
,
January 2010 in “Clinical Medicine Insights Endocrinology and Diabetes” Forearm hair has more cortisol than lower leg hair.
February 2026 in “Psychoneuroendocrinology” Hair cortisol concentration partly reflects HPA axis regulation but doesn't capture all its complexities.
33 citations
,
June 1995 in “International journal of legal medicine” Environmental factors can greatly reduce drug levels in hair.
12 citations
,
June 2017 in “Dermatologic therapy” Higher concentrations of dithranol can help regrow hair in severe alopecia areata.
Hair can show daily calcium changes, linked to body calcium levels and influenced by hormones, and can help assess calcium metabolism issues.
January 2023 in “Journal of applied animal research” Short photoperiods improve cashmere growth and quality in goats by changing hormone levels and gene expression.
4 citations
,
December 2008 in “The Thai Journal of Veterinary Medicine” Zinc methionylglycinate improves dog hair and zinc levels better than zinc sulfate.
High concentrations of retinoic acid kill hair follicle stem cells, while low concentrations may help treat skin diseases.
19 citations
,
June 2020 in “General and comparative endocrinology” Hair cortisol is a reliable stress indicator in cattle but may not be valid for pigs.
17 citations
,
May 2007 in “Forensic Science Medicine and Pathology” Clozapine levels in hair reflect dosage and bind more to pigmented hair.
5 citations
,
March 2020 in “Aids Reviews” Hair antiretroviral concentration is affected by hair type, segment position, housing, drug use, sexual behavior, kidney function, and genetics.
5 citations
,
July 2014 in “Journal of X-Ray Science and Technology” Hair analysis can help diagnose cell ion channel activity and calcium deficiency.
Zinc levels and lymphocyte counts might be important in heart disease development.
Hair hormone levels can indicate stress after a medically indicated abortion.
90 citations
,
July 2014 in “Conservation Physiology” Hair cortisol levels in brown bears can be affected by both long-term and short-term stress.
64 citations
,
April 1972 in “American Journal of Clinical Nutrition” Hair chromium levels reflect nutritional status after standard washing.
50 citations
,
November 2020 in “Physiology & behavior” People with depression often have higher hair cortisol levels, while those with PTSD tend to have lower levels, but more research is needed to understand this fully.
48 citations
,
March 2003 in “BJOG: An International Journal of Obstetrics and Gynaecology” Mothers and newborns with dental fillings had higher mercury in their hair, but getting fillings during pregnancy didn't raise mercury levels further.
33 citations
,
January 2017 in “Psychoneuroendocrinology” Hair dyeing and washing frequency do not affect hair cortisol levels.
30 citations
,
July 2016 in “Psychoneuroendocrinology” 24 citations
,
January 2019 in “Hormone Research in Paediatrics” Hair cortisol levels in children are influenced by puberty, age, gender, and body mass index.
24 citations
,
October 2018 in “Addiction Biology” Alcohol dependence affects stress hormone levels more than childhood maltreatment.
22 citations
,
August 2016 in “European Eating Disorders Review” Adolescent girls with anorexia nervosa have lower hair cortisol levels than healthy and psychiatric peers.
21 citations
,
January 2017 in “MethodsX” Methanol is better than isopropanol for washing grizzly bear hair to measure cortisol.
21 citations
,
January 2016 in “NeuroImmunoModulation” Hair cortisol levels can indicate stress over the past three months.