A1 Versus A2® Milk on the Gastrointestinal Physiology, Symptoms and Cognitive Behaviour for the Preschool Children

Inclusion Criteria:

• Non-regular milk drinker;

• Suffered from mild to moderate milk intolerance;

• Agree not to take any medication, supplements, nutrition or other dairy productsincluding acidophilus milk;

• Parent(s) or legal guardian's consent to the study and willing to comply with studyprocedures;

• Parent(s) or guardian of infant agrees not to enroll infant another clinical studywhile participating in this study;

• Fully understand the nature, objective, benefit and the potential risks and sideeffects of the study.

Exclusion Criteria:

• Have known dairy allergy;

• Suffered from severe milk intolerance;

• Unable to give written informed consent;

• Use of antibiotics at the time of screening, or during the past two weeks;

• Have history of fecal impaction;

• Trying to lose weight by following a diet or exercise regimen designed for weightloss, or taking any drug influencing appetite and any drug for weight loss for thelast three months;

• Have participated in similar dairy or probiotics-containing product's clinical trialswithin 3 months before the screening;

• Currently taking medicines for cardiovascular or metabolic disease;

• Have history of or be diagnosed of any of the following diseases that may affect thestudy results: gastrointestinal disorders, hepatopathy, nephropathy, endocrinedisease, blood disorders, respiratory and cardiovascular diseases;

• Currently suffering from any gastrointestinal disorders or gastrointestinal disease ,including but not limited to: irritable bowel syndrome, colitis, ulcerative colitis,celiac disease, irritable bowel syndrome (IBS);

• Had hospitalizations within 3 months before screening;

• According to investigator's judgment, current frequent users of drugs may affect thegastrointestinal function or immune system.