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