Color Synbiotics Study

Inclusion Criteria: * Healthy term infants (gestational age ≥ 37 1/7 and ≤ 41 6/7 weeks) aged 46 - 65 days (inclusive) at entry into the study * Fully formula fed for at least one week (not applicable for the breastfeeding reference group since these infants must be exclusively breastfed before and throughout the study) * Parents' or legal guardian's written informed consent Exclusion Criteria: * Exclusion criteria for run-in period (visit 1, screening) are: * Being weaned before inclusion (introduction of any other foods other than formula or human milk) * Moderate or severe acute malnutrition, defined as weight-for-age and sex below -2 z-scores of the median WHO growth standards * Medical condition for which a special diet other than standard (non hydrolised) cow's milk-based infant formula is required * Known congenital diseases or malformations which could interfere with the study (e.g. gastrointestinal malformations, congenital immunodeficiency), as per investigator's clinical judgement * Use of systemic antibiotics or anti-mycotic drugs in the 4 weeks prior to entry into the study * Received Inactivated Poliovirus Vaccine (IPV) or Rotavirus Vaccine (RV) prior to entry into the study * Gastroenteritis or diarrhoea in the last two weeks prior to entry into the study * Participation in any other studies involving investigational or marketed products concomitantly or within two weeks prior to entry into the study * Investigator's uncertainty about the willingness or ability of the parents to comply with the protocol requirements