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
,
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.
18 citations
,
November 1998 in “Comparative biochemistry and physiology. Part A, Molecular & integrative physiology” Changes in prolactin and DHEA levels are not required for the start of mink hair growth cycles.
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.
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.
8 citations
,
July 2002 in “X-Ray Spectrometry” Elemental composition of hair affects its x-ray diffraction patterns.
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
,
July 2022 in “Clinical and Experimental Dermatology” Using more than 5% minoxidil can help hair growth more, but results vary and side effects may increase.
4 citations
,
January 2001 in “PubMed”
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.
2 citations
,
October 1999 in “Annals of the New York Academy of Sciences” Melatonin and cortisol affect mink winter hair growth, but β-endorphin levels do not.
1 citations
,
March 2024 in “International Journal of Applied Pharmaceutics” Propylene glycol concentration improves rice water gel shampoo's thickness and foam, extending its shelf life.
1 citations
,
July 2023 in “Psychoneuroendocrinology” Hair cortisol is a reliable marker of long-term cortisol levels and is linked to daytime saliva cortisol but not morning levels.
1 citations
,
January 2023 in “International journal of urology” Low zinc levels are linked to low testosterone but not to sexual problems.
1 citations
,
September 2016 in “Brain Behavior and Immunity” Hair cortisol levels can indicate stress and are affected by washing frequency, not cosmetic treatments.
February 2026 in “TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES” Hair cortisol is better than blood cortisol for measuring long-term stress in pregnant goats.
January 2026 in “Psychoneuroendocrinology” Lye relaxers don't significantly change hair cortisol levels.
January 2026 in “Neuroscience Applied” Hair cortisol levels decrease as children age, stabilizing around age 4.
November 2025 in “Archives of Dermatological Research” Using a higher concentration of triamcinolone acetonide leads to faster hair regrowth in scalp patchy alopecia areata.