Outcome measures: (1) General information, general health and wellbeing, regular body check;(2) Anthropometric parameters: body length, body weight, and head circumferences; (3) Stool characteristics (color , volume, stool consistency, and frequency;(4)Behavior and habits; (5) Gut microbiota; (6) Residual nutrients in feces (nitrogen,total fat, fatty acids, minerals); (7) adverse events and concomitant medications; (8) compliance. Slopes of changes from baseline to 6 and 12 weeks post intervention in anthropometric parameters, stool characteristic index, fecal residual nutrients, pattern score of gut microbiota, behavior and habit index were be calculated.