Conclusions

♦ Based on the data ofthis cross sectional study enrolling almost 10,000

children there is strong evidence that breast-fed children are less likely to be overweight or obese at school entry than formula fed children.

♦ This effect reflects "fattening" of the upper tail of the BMI distribution for non breast-fed children but is not due to a shift ofthe mean.

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Body Mass

Index -non breastfed -breastfed

♦ There is some evidence that the reduced risk of overweight/obesity in breast-fed children is related to the properties ofhuman milk and not to different genetics or lifestyle factors in these children. Further research for confirmation ofthis statement is needed, however.

♦ The causal factor in human milk, accounting for its protective effect againstoverweightawaitsidentification.

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