Effects of Shampoo and Water Washing on Hair Cortisol Concentrations

    October 2010 in “ Clinica Chimica Acta ”
    Amanda F. Hamel, Jerrold S. Meyer, Elizabeth Henchey … Melinda A. Novak
    Studysummary In this study, washing rhesus monkey hair with water or shampoo significantly reduced cortisol levels, suggesting potential underestimation of chronic stress hormone deposition in hair due to washing.
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    Research cited in this study 2

    1. Hair as a Retrospective Calendar of Cortisol Production—Increased Cortisol Incorporation into Hair in the Third Trimester of Pregnancy Psychoneuroendocrinology · 2008
    2. Measurement of Cortisol in Human Hair as a Biomarker of Systemic Exposure Clinical and investigative medicine · 2007

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