Is there such a thing as good stress? Or is stress always bad? Should we avoid all stress to live a long and healthy life? These were some of the questions Valerio Zeno posed in his tv-show Valerio4Ever, on his quest for eternal (or a very long) life.
Hair analysis has been used for decades to detect drug abuse. However, recent studies suggest that hair also contains levels of the stress hormone cortisol. This yields unique retrospective information about stress exposure.