The Effect Of Drinking Soy Milk And Milk Powder On Preschool Children’s Intestinal Metabolism

ObjectiveTo evaluate the effect of drinking soy milk and milk powder on preschoolers’ intestinal metabolism, and to provide scientific basis for the guidance of preschool children’s reasonable soy milk drinking.MethodsThe preschool children’s dietary behavior was investigated by KAP questionnaire in a kindergarten of Zhengzhou. Meanwhile, the preschool children’s height and weight were measured in order to evaluate their growth and development. Secondly,the two weeks’ dietary intervention experiment was developed. The protein and total flavonoids contents in soy milk and milk were detected by Kjeldahl method and spectrophotometry, respectively. After that, the preschool children were divided into blank group, milk powder group and soy milk group. The preschool children from soy milk group were required to drink 75 m L soy milk every day and the children from milk powder group were required to drink 75 mL milk every day for intervening period. Finally, the contents of equol and SCFA in preschool children’s fecal samples were determined by high performance liquid chromatography(HPLC)and GC, respectively. The experimental data were analyzed using the SPSS21.0.Results1 In the process of dietary intervention, the protein and flavonoids content were detected in soy milk and milk powder. The crude protein and total flavonoids content in soy milk were(32.79±0.45) g/100 g and(1.05±0.01) g/100 g, respectively. The crude protein and total flavonoids content in the milk powder were(17.28±0.07)g/100 g and(0.18±0.03) g/100 g, respectively.2 Among the preschool children, 51.40% of them had milk and its products every day and 11.70% of them had beans and nuts every day. The frequency that preschool children had potato, fish, beans and nuts, grains was mainly 1 to 2 times per week.More than 50% of the preschool children had vegetables, fruits and milk every day.preschoolchildrenoftenhadporridge(89.39%),eggs(79.33%),steamedbread(67.04%)anddairy(65.36%)atbreakfast.3underthisexperimentalcondition,thecontentofequolinpreschoolchildren’sfecalsamplesinblankgroup,milkpowdergroupandsoymilkgroupafterthe intervention were(4.05±3.54) μg/g,(4.28±3.73) μg/g and(7.83±8.31) μg/g,respectively. The content of equol in soy milk group was higher than that in blank group and milk powder group, and the difference was statistically significant(P<0.05). The difference of equol content of preschool children’s fecal samples was not statistically significant between girls and boys in the soy milk group(P>0.05).4 Under this experimental condition, the propionic acid, isobutyric acid, butyric acid content were increased in preschool children’s fecal samples in the milk powder group and the soy milk group after the intervention, and the difference was statistically significant(P<0.05). After the intervention, the propionic acid,isobutyric acid and butyric acid in preschool children’s fecal samples in the milk powder group were increased to(0.89±0.86) mmol/100 g,(0.051±0.050) mmol/100 g and(0.57±0.57) mmol/100 g, respectively. The propionic acid, isobutyric acid and butyric acid in preschool children’s fecal samples in the soy milk group increased to(0.81±0.61) mmol/100 g,(0.049±0.046) mmol/100 g and(0.61±0.54) mmol/100 g,respectively.Conclusions1 The protein and flavonoids in the soy milk are higher than those in milk powder in this soy milk intervention experiment.2 Among the preschool children in the kindergarten, the consumption of milk and its products is higher than that of beans and its products.3 Under this experimental condition, drinking soy milk has more obvious effect than milk powder in terms of increasing the equol and SCFA contents in preschool children’s intestine and improving preschoolers’ intestinal metabolism.