Effects of soy protein supplementation on serum adiponectin concentration
According to our analysis on 14 studies, in overall, soy and soy product consumption had significant effect on adiponectin concentration: WMD = 0.09; 95% CI: 0.04, 0.15; P = 0.001. There was significant heterogeneity among the studies (Cochran’s Q test = 165.27, P = 0.000, I2 = 92.7 %). Subgroup analysis of gender of participant, baseline BMI, dose of soy protein, duration of studies, supplementation type and study design had no significant effect on adiponectin concentration in any subgroups. The results of subgroup analysis are shown in Table 3 and the forest plot is shown inFigure 2 .