Renal function in db/db mice. The TNTL (TNTL-h, m, l = 3.6 g, 1.8 and 0.9 g/kg b.w., resp.) administration resulted in reduced plasma levels of BUN (a) and CRE (b), compared to the model group. The TNTL groups (3.6 g/kg) have significant reductions in levels of BUN (a) and CRE (b), compared to Met group. The TNTL groups (3.6 g/kg) have significant reductions in levels of BUN and CRE by 18% and 10%, respectively, compared to the model group. Control: C57BL, DM: db/db mice with untreated, Met: db/db mice treated with metformin, and TNTL-h, m, l: db/db mice treated with 3.6 g, 1.8 and 0.9 g/kg b.w., respectively. #
P < 0.05 compared with DM group. *
P < 0.05 compared with control group.