Calcium, Probiotics and Acute Diarrheal Disease Among Indonesian Children

Inclusion Criteria: * Apparently healthy children aged 1-6 years, with emphasize on aged 2-5 years, living permanently in low socio-economic urban areas of East Jakarta for at least 6 months * Parents are willing to sign the informed consent and give the supplements to the children for the period of 6 months * Capable and willing to drink liquid milk with a straw (acceptance to be tested at screening by providing a sample drink and placebo straw to be consumed under supervision for 2 days) Exclusion Criteria: * Calcium intake exceeding 75% of the RDA for calcium (\<375 mg/d) based on a Food Frequency Questionnaire * Currently breastfed children * Siblings of already included children that are living in the same household, except if it is a twin sibling * Severely malnourished with or without oedema (Weight for height-WHZ Z-score of \<-3.00 SD) * Symptoms of chronic/congenital diseases and disabilities, suspected Tuberculosis by clinical examination, and /or history of allergic disease. * Taking (any) antibiotics during 2 weeks prior to start of the study (children will be included after 3 weeks of last antibiotic intake * Participation in another clinical trial at the same time or 2 months prior to the start of this study * Both mothers and other caregivers present in the family are illiterate