Correlation of cortisol in 1-cm hair segment with salivary cortisol in human: hair cortisol as an endogenous biomarker January 2011 in “ Clinical Chemistry and Laboratory Medicine (CCLM) ” Qiaozhen Xie, Wei Gao, Jifeng Li, Ting Qiao, Jing Jin, Huihua Deng, Zuhong Lu We don't know much about this study yet. We're maintaining the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on degruyter.com →
research Neuroimmunology of Stress: Skin Takes Center Stage 375 citations, August 2006 in “Journal of Investigative Dermatology” Stress can worsen skin and hair conditions by affecting the skin's immune response and hormone levels.