November 2023 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Pig hair cortisol levels are inheritable and linked to stress responses, which could help select for more resilient pigs.
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.
November 2024 in “Psychoneuroendocrinology” Testosterone increases hair testosterone levels, stress raises hair cortisol, and relationship status affects hormone levels.
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.
12 citations,
December 2020 in “Comprehensive psychoneuroendocrinology” Hormone levels in hair change during pregnancy, with progesterone increasing significantly compared to non-pregnant women.
September 2023 in “Scientific reports” Segmental hair analysis can track testosterone over time but needs adjustments for sex, hair color, and washing frequency.
1 citations,
October 2023 in “PloS one” Cosmetic hair treatments can increase hair testosterone levels, while natural hair color does not affect it.
2 citations,
July 2021 in “The journal of investigative dermatology/Journal of investigative dermatology” Sex hormones likely don't affect atopic dermatitis in adolescents and adults.
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.
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.
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.
June 2024 in “Molecules/Molecules online/Molecules annual” Platycladus orientalis flavonoids protect balding hair from UV damage and slow hair color change.
Hair and nails can show hormone changes during puberty in dogs.
5 citations,
January 2021 in “Biomedicine & Pharmacotherapy” Policosanol helps treat hair loss by balancing hormones and supporting hair growth.
7 citations,
October 2017 in “The Prostate” Baldness in men with prostate cancer is linked to higher levels of certain sex hormones, but chest hair density is not.
11 citations,
September 2020 in “Steroids” A new method accurately measures steroid hormones in a few hair strands and could help study chronic stress and hair loss.
1 citations,
December 2015 in “The Egyptian Journal of Histology” Hypothyroidism harms rat skin, but topical triiodothyronine may help improve it.
166 citations,
October 2018 in “Endocrine Reviews” Hormone treatments for transgender individuals generally improve mental health and physical transition, with some health risks that require medical supervision.
52 citations,
October 2004 in “Veterinary dermatology” Melatonin and mitotane treatment led to hair re-growth in 62% of dogs with Alopecia X, but this was not always linked to normal hormone levels.
January 2023 in “Journal of applied animal research” Short photoperiods improve cashmere growth and quality in goats by changing hormone levels and gene expression.
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.
7 citations,
October 2015 in “American Journal of Primatology” Monkeys with hair loss during pregnancy showed higher stress hormone levels and invested differently in their offspring.
1 citations,
October 2020 in “PubMed” Hormone testing may not be very helpful in diagnosing female pattern hair loss.
34 citations,
March 2003 in “Veterinary Dermatology” Most dogs with alopecia had higher than normal levels of certain hormones, but hair loss might not always be linked to these hormone changes.
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.
9 citations,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Sex hormones and antiandrogens can either stimulate or inhibit human hair follicle cell growth depending on the dose.
20 citations,
August 1987 in “Journal of steroid biochemistry/Journal of Steroid Biochemistry” Aldactone was more effective in reducing hair growth in women with hirsutism than Diane, despite having less impact on hormone levels.
12 citations,
July 1993 in “The journal of investigative dermatology/Journal of investigative dermatology” Certain sex hormones and antiandrogens can either slow down or speed up the growth of human hair follicle cells depending on their concentration.
August 2022 in “Italian Journal of Animal Science/Italian journal of animal science” Field bean supplementation improved mohair growth and kid growth in Angora goats but didn't prevent weight loss after giving birth.
2 citations,
January 2020 in “Clinical and experimental obstetrics & gynecology” Hair levels of estradiol and progesterone are higher in premenopausal than postmenopausal women, but the difference isn't statistically significant, indicating the need for a better measurement method.