February 2023 in “Global journal of health sciences and research” Zinc levels are not significantly linked to the presence or severity of 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.
85 citations
,
January 2014 in “Hormone Research in Paediatrics” Hair cortisol levels in children increase with age but are not affected by gender, puberty, or hair care.
80 citations
,
January 2011 in “Clinical Chemistry and Laboratory Medicine (CCLM)” Hair cortisol levels can reflect salivary cortisol levels in humans.
73 citations
,
May 1976 in “JAMA” Long-term parenteral nutrition without zinc can cause severe zinc deficiency.
64 citations
,
April 1972 in “American Journal of Clinical Nutrition” Hair chromium levels reflect nutritional status after standard washing.
44 citations
,
February 2016 in “Zoology” Hair cortisol levels in primates are useful for stress assessment but vary by age, sex, species, and hair collection methods.
28 citations
,
May 2014 in “PubMed” Higher stress levels may be linked to hair loss in rhesus macaques.
25 citations
,
April 1972 in “American Journal of Clinical Nutrition” Hair chromium levels show past nutritional status, not environmental exposure.
24 citations
,
January 2019 in “Hormone Research in Paediatrics” Hair cortisol levels in children are influenced by puberty, age, gender, and body mass index.
23 citations
,
March 2016 in “American Journal of Primatology” In female rhesus monkeys, hair gain is linked to reduced stress levels.
18 citations
,
January 1978 in “Advances in experimental medicine and biology” Hair cystine levels may indicate protein malnutrition, but more research is needed.
10 citations
,
January 1985 in “PubMed” Low zinc levels in hair are linked to hair loss and diaper rash in infants.
6 citations
,
January 1988 in “Japanese Journal of Medicine” Hair glycation levels can indicate long-term blood sugar control.
4 citations
,
January 2023 in “Veterinary Sciences” The treatment improved dogs' greasy seborrhea without side effects.
1 citations
,
November 2022 in “Nutrients” Hair glucocorticoid levels and gut bacteria are linked to growth rates in piglets.
1 citations
,
December 2021 in “American Journal of Obstetrics and Gynecology” Hair cortisol levels peak in the third trimester and decline postpartum.
1 citations
,
September 2016 in “Brain Behavior and Immunity” Hair cortisol levels can indicate stress and are affected by washing frequency, not cosmetic treatments.
June 2026 in “Psychoneuroendocrinology” Higher cortisol levels and stress are linked to worse cognition and more fatigue in MS patients.
April 2026 in “Comprehensive Psychoneuroendocrinology” Hair cortisol levels may be linked to stress, but results are inconsistent.
April 2026 in “Journal of Experimental Psychopathology” Hair cortisol levels may not reliably indicate psychological distress.
January 2026 in “Western Journal of Nursing Research” Hair cortisol levels don't reliably indicate chronic stress in people with multiple sclerosis.
January 2026 in “Phaidra - Repository of the University of Veterinary Medicine, Vienna” Hair cortisol levels in wolves reflect stress and vary by season and body region.
January 2026 in “Neuroscience Applied” Hair cortisol levels decrease as children age, stabilizing around age 4.
Hair hormone levels can indicate stress after a medically indicated abortion.
May 2024 in “Pakistan Journal of Health Sciences” Iron deficiency is linked to hair loss in CTE patients.
June 2023 in “International journal of molecular sciences” Heat stress changes goats' skin and hair at the microscopic level and affects their genes and skin bacteria.
February 2020 in “VSNU Open Access deal” Hair cortisol levels change with age, starting high at birth, decreasing until age 6, then rising to adult levels by age 18.
Hair cortisol levels can effectively indicate long-term hormone activity.
January 2014 in “S. Karger AG eBooks” Type 2 diabetes in youth is increasing, with high treatment failure rates and more severe than Type 1; certain drugs can lower lipid levels effectively with varying side effects, and apples may benefit heart health like statins but with fewer side effects.