METHODS	Volunteers ingested 400 ml preOp , which is a clear carbohydrate drink ( CCD ) ( 50 g carbohydrate , 0 g protein ) , 70 g ONS ( 50 g carbohydrate and 15 g glutamine ) dissolved in water to a total volume of 400 ml ( ONS400 ) and 300 ml ( ONS300 ) .\