Table 1.

Mean inhibitory concentrations (IC50) of metformin in NIH 3T3 and RAW 264.7 cell lines (n = 3; means and confidence intervals (95%)).

	IC50 (mM)	95% IC50 (mM)
NIH 3T3	2.71	1.02~3.282
RAW 264.7	2.15	1.32~2.98