Insulin-induced suppression of free fatty acids was greater ( P < 0.05 ) after treatment with pioglitazone ( 0.14 + / - 0.03 vs. 0.06 + / - 0.01 mmol/l ) but unchanged with metformin ( 0.12 + / - 0.03 vs. 0.15 + / - 0.07 mmol/l ) .
