A validation study on fingernail cortisol: correlations with one-month cortisol levels estimated by hair and saliva samples.

  title={A validation study on fingernail cortisol: correlations with one-month cortisol levels estimated by hair and saliva samples.},
  author={Shuhei Izawa and Nagisa Sugaya and Namiko Ogawa and Kentaro Shirotsuki and Shusaku Nomura},
Several studies have focused on the cortisol levels in fingernail samples as a possible index of cumulative hormone production; however, the biological validity of fingernail cortisol has not been fully established. We investigated the association between cortisol levels in fingernail samples and other biological specimens, including hair and saliva samples, in healthy young adults to determine whether fingernail cortisol was associated with past cumulative hormone production. Participants were… Expand


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