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.
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.
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.
19 citations
,
April 2020 in “Journal of the American Academy of Dermatology” 5 mg/mL of triamcinolone acetonide is most effective for hair regrowth with fewer side effects.
17 citations
,
May 2007 in “Forensic Science Medicine and Pathology” Clozapine levels in hair reflect dosage and bind more to pigmented hair.
15 citations
,
July 2012 in “Biological trace element research” Higher hair calcium to magnesium ratios and lower chromium levels in hair may indicate insulin resistance in Korean men.
15 citations
,
June 1996 in “Journal of Pharmacy and Pharmacology” Caffeine levels in hair and blood can indicate liver health.
14 citations
,
October 2022 in “Journal of the American Heart Association” Lower testosterone levels may increase heart failure risk in older men.
14 citations
,
May 2019 in “Chemosphere” Females have higher Dechlorane Plus in hair, while males have more in dorm dust.
14 citations
,
January 2001 in “Clinical chemistry” Hair can be used to measure cancer-related chemicals noninvasively.
13 citations
,
January 2020 in “Experimental Dermatology” PRP growth factor concentrations vary, no significant hair growth difference found.
12 citations
,
February 2020 in “The Journal of Clinical Endocrinology & Metabolism” More body hair in young Australian women is linked to higher androstenedione levels.
12 citations
,
March 2000 in “Clinical Chemistry” Chronic DHEA supplementation slightly increases testosterone in hair but stays within safe limits.
11 citations
,
April 2020 in “Animals” Moving horses to new places can increase their stress levels, as shown by higher stress hormone in their hair.
10 citations
,
June 2013 in “International Journal for Vitamin and Nutrition Research” High hair calcium levels are linked to low calcium intake and low bone density.
8 citations
,
July 2002 in “X-Ray Spectrometry” Elemental composition of hair affects its x-ray diffraction patterns.
7 citations
,
October 2024 in “Drug Delivery and Translational Research” A 4% nanoparticle concentration and 4 Hz massage improve drug delivery into hair follicles.
7 citations
,
February 2021 in “Legal Medicine” Hair analysis showed very high metformin levels in two fatal overdose cases, suggesting it's useful in forensics but sweat may affect results.
7 citations
,
January 2002 in “Biological Trace Element Research” Children with pituitary dwarfism have higher zinc and copper, lower manganese, and similar iron levels in hair compared to normal children.
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.
4 citations
,
June 2025 in “JMIR Formative Research” Hair cortisol concentration may reflect some physiological stress but doesn't strongly correlate with perceived stress.
4 citations
,
January 2011 in “Chinese Herbal Medicines” Improving wogonin's solubility greatly increases its absorption in the body.
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.
3 citations
,
October 2021 in “Clinica Chimica Acta” Hormone levels in hair vary across the head, with the highest concentration of a key hormone linked to hair loss at the top.
3 citations
,
May 2021 in “International Journal of Endocrinology and Metabolism” Irisin and GIP levels are not linked to BMI in women, regardless of PCOS status.
3 citations
,
April 2018 in “JURNAL ILMU KEFARMASIAN INDONESIA” Ambon banana weevil extracts can be used in hair care products to promote hair growth.