The FBG levels of subjects who received Syzygium cumini (L) Skeels seed extract at basal, week 4, 8 and 12 are 111.25+8.136, 104.150+11.69, 104.9+14.186 and 102.2+18.895, respectively (as shown in Table 2). There are statistically significant differences in reduction of FBG in the experiment group at week 4 and 12 when compare to basal (p = 0.017 and p = 0.040) (as shown in Table 3).The FBG levels of subjects in the control group are 113.06+8.242, 110.24+24.466, 108.530+20.338 and 104.29+18.278, respectively (as shown in Table 2). We found that the FBG levels are not different at any time after receiving placebo (p > 0.05).