An emerging field in the study of resilience is the neurobiological basis of resilience to stress.[22] For example, neuropeptide Y (NPY) and 5-Dehydroepiandrosterone (5-DHEA) are thought to limit the stress response by reducing sympathetic nervous system activation and protecting the brain from the potentially harmful effects of chronically elevated cortisol levels respectively.[23] In addition, the relationship between social support and stress resilience is thought to be mediated by the oxytocin system's impact on the hypothalamic-pituitary-adrenal axis.[24] "Resilience, conceptualized as a positive bio-psychological adaptation, has proven to be a useful theoretical context for understanding variables for predicting long-term health and well-being" .