Low serum zinc concentration is associated with low serum testosterone but not erectile function

Objective To investigate the relation between serum zinc concentration and several factors, including serum testosterone concentration and the score of questionnaires on sexual function in patients with sexual problems. Methods This study comprised 720 men (age, 46.3 [21–83] years) with some kind of sexual problem. Age, scores of the Sexual Health Inventory for Men and the Erection Hardness Score, and endocrinologic data including serum concentrations of testosterone, prostate‐specific antigen, and zinc were included in this study. After serum zinc concentration of the men was classified into 5 groups (