Unhealthy narcissism leads to elevated stress hormone in men.
Narcissists exist throughout society. Self-absorbed. Entitled. Lacking empathy. In mild forms, narcissism can help men succeed. More unhealthy forms can affect relationships and lead to aggression. Around one percent of the population suffers from narcissism severe enough to be classified as a personality disorder.
The effects that narcissists have on those around them are easily noticeable. Less clear, though, is the damage that they do to themselves. A new study of 106 undergraduate students in the U.S. shows that unhealthy narcissism in men is strongly related to higher levels of the stress hormone cortisol. This connection was 2.5 times greater than what was seen in women with the same type of personality