Inclusion Criteria:  Lactating mother aged 25 ~ 35 years Breastfeeding infants (aged 15 ~180 days) and express sufficient breast milk Mother is in good health and has balanced nutrition Mother is non smoker and non alcoholic, no smokers living in the same apartment Voluntarily signed the Informed Consent Form  Exclusion Criteria:  Mother or newborn infant has major diseases Mother participating in any other nutritional or pharmaceutical intervention studies recently Other conditions that are not suitable for this study