“…Also in agreement with our results, it has been reported that serum NO x levels are higher in young men compared with young women (Watanabe et al, 2000). On the other hand, Peinado et al (2007), studying 104 men and 96 women, have reported that there were no significant differences between serum NO x concentrations in men and women; these findings support the results of the current study regarding only the age range of over 30 years. Taking in account the number of subjects, the wide range of the ages of the subjects, and the method of sampling, it can be considered that findings of this study are more generalizable compared to the above-mentioned reports.…”