Fifty-two patients with fasting glucose 100-240mg / dL or glycosylated hemoglobin ( HbA1c ) 6.0 % and alanine aminotransferase ( ALT ) 40-250 IU/L were randomized to receive metformin ( 250mg t.i.d. ) , or metformin ( 250mg t.i.d. ) and carnitine-orotate complex ( 300mg t.i.d. ) for 12 weeks ( n = 26 per group ) .