Thirty minutes after the intake of a standardized breakfast , participants received an ileal infusion , containing control ( ( C ) saline ) , safflower oil ( ( HL ) 51.7 kcal ) , low-dose casein ( ( LP ) 17.2 kcal ) or high-dose casein ( ( HP ) 51.7 kcal ) , low-dose sucrose ( ( LC ) 17.2 kcal ) and high-dose sucrose ( ( HC ) 51.7 kcal ) , over a period of 90min .