However, there were insignificant differences in overweight/obesity (p > 0.05, Cohen’s d = 0.22), EC (p > 0.05, Cohen’s d = −0.10), BDNF (p > 0.05, Cohen’s d = −0.20), and 5-HT (p > 0.05, Cohen’s d = 0.15) between the two genders (Table 1). The gene discussed is HTR5A; the disease is obesity due to melanocortin 4 receptor deficiency.