The aim of our study is to assess the effect of daily consumption of yogurt containing probiotic bacteria BB12 on the health and growth of healthy children 12-48 months of age in out of home child care.

Inclusion Criteria:

• An informed consent has been signed by the parents.
• The child is at least one year old and has not had his 4th birthday at the beginning of the study
• The child is healthy.
• The child attends child care center at least 5 days a week, > 4 hours per day.

Exclusion Criteria:

• Was born preterm.
• Had a birth weight <2,500 g.
• Has congenital anomalies.
• Has a structural abnormality of the digestive tract or previous significant gastrointestinal surgery.
• Has chronic disease or malignancy.
• Has a serious, unstable medical condition.
• Is Failure to Thrive (FTT) (<5th percentile of ideal body weight).
• Has an allergy or atopic disease.
• Has an allergy or intolerance to milk/dairy products.
• Has an established diagnosis of lactase deficiency.
• Is predisposed to infection (i.e., compromised immune system, HIV-AIDS, active bacterial disease, under steroid treatment).
• Received antibiotic treatment or intentionally consumes probiotic products during the preceding 4 weeks. (If the subject was on antibiotics before the beginning of the study or probiotics, a washout period of 2 weeks is required.)