“…Marrelli and collaborators (2014) emphasized the significance of these specific stress-biomarkers, which represent a powerful instrument to evaluate stress levels and that may help to reduce stress diseases and other pathologies and have a preventive effect in order to improve their quality of life [4]. The biomarkers used in the assessment of mental stress includes: -cortisol, which reflects hypothalamic-pituitary-adrenal (HPA) axis activity; -α-amylase, which represents the function of the autonomic nervous system (ANS); -proinflammatory cytokines (interleukin (IL)-6, IL-1b, and tumor necrosis factor (TNF)-a), which are related to innate immunity; -catecholamines (dopamine, norepinephrine, and epinephrine) are synthesized and released by noradrenergic neurons (biomarkers are measured in blood) [4,7,20].…”