10 citations
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May 2010 in “Analytica Chimica Acta” This study reported the development of two highly sensitive ELISA assays to detect banned substances finasteride and dutasteride in human urine, offering better sensitivity than existing HPLC/MS/MS methods.
66 citations
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February 1985 in “Archives of dermatological research” Hair dyes penetrate the scalp very minimally, less than 1%.
2 citations
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October 2018 in “Journal of Mind and Medical Sciences” This study developed a straightforward HPTLC method for detecting nicotine and cotinine in human plasma and urine, concluding that liquid-liquid extraction with methanol: chloroform: ammonia achieved optimal separation and is applicable for forensic analysis of lethal nicotine intoxication.
567 citations
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October 2007 in “Clinical and investigative medicine” This study described a new assay for measuring cortisol in hair and found it may serve as a useful biomarker for long-term cortisol exposure, correlating with 24-hour urine cortisol levels in non-obese subjects.
31 citations
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November 2003 in “Journal of Occupational Health” This study found that the reproductive function of female hairdressers may be negatively affected by long-term exposure to permanent-waving solutions containing thioglycolic acid, raising concerns about its potential carcinogenic effects.