PurposeThe purpose of this study is (1) to confirm the relationship between the two dimensions of social desirability (pretending and denying), self-reported stress and health reports in police officers and (2) to assess whether dysfunctions in basal cortisol profiles are related to social desirability.Design/methodology/approachSocial desirability is known to influence how individuals respond to sensitive topics, such as questions concerning health in the workplace, and has usually been defined according to two dimensions: pretending and denying. However, it is not known whether social desirability is only a bias in responding to health surveys or a more general attitude of denying problems and pretending to be stronger than one is in the everyday life. If the latter is true, social desirability may have important health implications, and underlying mechanisms must be described. In total, 77 police officers completed questionnaires measuring social desirability (denying and pretending), perceived stress as well as mental and somatic health symptoms. They were further instructed to collect saliva samples for cortisol concentrations assays.FindingsThese preliminary results showed that denying was negatively related to the report of stress and health symptoms. Furthermore, police officers higher in pretending showed a flatter diurnal cortisol slope.Research limitations/implicationsThe correlation between dysregulation of the hypothalmic-pituitary-adrenal (HPA) axis, as expressed by a flatter cortisol slope, and a higher score in the pretending subscale suggests that looking for social approval by inflating one's capacities is related to chronic work-related stress, making the individual more vulnerable to stress-related disease.Originality/valueTo study the potential health-relevant consequences and underlying mechanisms of social desirability bias related to police culture by including stress biomarkers.