Evaluation of Infants Fed an Extensively Hydrolyzed Infant Formula

Inclusion Criteria: * Participant is presently consuming an extensively hydrolyzed infant formula (EHF) for persistent feeding intolerance symptoms, symptoms of suspected food protein (milk and/or soy) sensitivity, or other conditions where EHF is deemed an appropriate feeding. * Parent(s) of infants confirm their intention not to administer prescription medications, over the counter medications, home remedies, prebiotics, probiotics, herbal preparations or rehydration fluids that might affect GI tolerance. * Parent(s) confirm their intention to feed their infant the study product as the sole source of nutrition for the duration of the study. * Parent(s) confirm their intention not to administer vitamins, minerals (with the exception of Vitamin D supplements), solid foods or juices to their infant from enrollment through the duration of the study. * Participant's parent(s) or a legally authorized representative (LAR) has voluntarily signed and dated an informed consent form (ICF) approved by an Independent Ethics Committee/Institutional Review Board (IEC/IRB) and provided Health Insurance Portability and Accountability Act (HIPAA) (or other applicable privacy regulation) authorization prior to any participation in the study. Exclusion Criteria: * An adverse maternal, fetal or participant medical history that is thought by the investigator to have potential for effects on growth, and/or development. * Participant is receiving oral or inhaled steroids. * Participant participates in another study that has not been approved as a concomitant study. * Participant has an allergy or intolerance to any ingredient in the study product. * Participant has been treated with antibiotics or other medications that in the opinion of the PI may affect growth, GI tolerance and/or development, within 2 weeks prior to enrollment.