122 citations
,
October 2010 in “Clinica Chimica Acta” Washing hair with water or shampoo lowers cortisol levels in hair.
64 citations
,
April 1972 in “American Journal of Clinical Nutrition” Hair chromium levels reflect nutritional status after standard washing.
33 citations
,
January 2017 in “Psychoneuroendocrinology” Hair dyeing and washing frequency do not affect hair cortisol levels.
1 citations
,
December 2021 in “International journal of research in dermatology” Dermatologists should learn more about shampoos to better treat hair and scalp issues.
February 2025 in “Journal of Forensic Sciences” Sonication washing reduces nuclei in hair roots, affecting DNA extraction.
2 citations
,
January 2015 in “Sen'i Gakkaishi” Washing permed hair after using thioglycolic acid helps reform strong bonds, making hair stronger.
6 citations
,
March 2012 in “Journal of the European Academy of Dermatology and Venereology” The oral contraceptive improved hair and skin quality in women.
7 citations
,
January 1981 in “Springer eBooks” Certain small molecules and polymers can change hair's physical properties and how it feels by affecting the bonds within the hair.
2 citations
,
July 2023 in “Cosmetics” Surfactants in shampoos and conditioners remove some but not all lipids from hair, and more research is needed to understand their full impact.
1 citations
,
December 2011 in “Journal of the American Academy of Dermatology” Using hair oil/grease may be linked to dandruff in African American girls.
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.
June 2014 in “Toxicologie analytique et clinique/Annales de toxicologie analytique” Older age increases positive hair alcohol test results, and chest hair is a good alternative for testing; season affects results, with higher levels in winter.
6 citations
,
May 2003 in “PubMed” Small amounts of DNA can be found in the hair shaft, especially near the root, but it decreases with hair treatments and washing.
2 citations
,
July 2008 in “Hair transplant forum international” MRSA infections can occur in hair transplant surgeries, so it's important to test for it before treatment, keep everything clean, and follow treatment based on test results.
May 2011 in “Journal of pediatric nursing” A patient with congenital adrenal hyperplasia improved after adjusting her medication to prevent Cushing's syndrome symptoms.
4 citations
,
November 2017 in “Journal of Cosmetic Dermatology” Certain polymers can stick to hair and increase volume, working best at a pH of 7 to 9.
84 citations
,
February 2013 in “Clinica chimica acta” Hair mineral analysis might help diagnose diseases early, but standard methods are needed.
2 citations
,
December 2015 in “International Journal of Dermatology” Washing test helps identify hair loss type, low iron levels significant.
2 citations
,
June 2003 in “International Journal of Acarology” Researchers found a new mite species causing severe hair loss and skin problems in yellow-bellied marmots.
1 citations
,
January 2012 in “Médecine et Maladies Infectieuses” The man's symptoms improved significantly after penicillin treatment for syphilis.
11 citations
,
December 2014 in “The American journal of pathology” A gene deletion in mice causes weak protein, immune issues, hair loss, airway problems, and wasting disease.
68 citations
,
May 2013 in “The American journal of medicine” Traditional Chinese medicines with heavy metals can cause severe poisoning.
December 2024 in “Journal of Clinical Research in Pediatric Endocrinology” 21-hydroxylase deficiency causes hormone imbalances leading to various symptoms, and diagnosis involves clinical and genetic tests.
4 citations
,
January 2021 in “Skin appendage disorders” Washing hair daily is better and preferred, with no negative effects.
4 citations
,
October 2018 in “Skin appendage disorders” Co-washing is gentler on hair but can cause residue buildup.
January 2019 in “Hair transplant forum international” Clean and sterile gloves showed no difference in scalp contamination during hair transplant surgery.
January 2017 in “Elsevier eBooks” Congenital Adrenal Hyperplasia is mainly caused by enzyme deficiencies, leading to varying symptoms like hormone imbalances and physical changes.
21 citations
,
January 2017 in “MethodsX” Methanol is better than isopropanol for washing grizzly bear hair to measure cortisol.
3 citations
,
January 2019 in “Skin research and technology” All wiping methods are as effective as washing for removing cleaning agent from hair.
1 citations
,
September 2016 in “Brain Behavior and Immunity” Hair cortisol levels can indicate stress and are affected by washing frequency, not cosmetic treatments.