Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Anand et al. found that concentrations of cortisol in hair were higher in black children than in those of other ethnicities, indicating the presence of more stressors in early life. Public health measures to reduce disparities between races should take into consideration the long-term effects of chronic stress in early life. See the article on page 1119.