Objective To survey the change of nutrition labeling on prepackaged food in Hangzhou supermarkets before and two years after promulgating the Regulation for Food Nutrition Labeling.Methods Nutrition facts,nutrition claims and nutrient function claims on prepackaged food in a supermarket were copied with prepared questionnaire in 2008 and 2010,and a normative judgment was made.Results There were 4 693 and 5 526 kinds of domestic prepackaged food investigated in 2008 and 2010,respectively.The numb...