Sensitivity to milk may be stored in a patient from a few months to a few years or even a lifetime (see Chapter IX). Since the degree of maturity of the gastrointestinal tract may play an important role in the development of allergic reactions, we think it appropriate to appoint sensitive to milk, dairy-free diet for children 6 months or until the end of the 1st year of life. When a child is one year, under the supervision of a physician conducted a sample of milk to decide on is whether he sensitization to milk. If, in response to the test in a child develop symptoms of allergy to milk, switching back to a strict dairy-free diet. Repeated oral test is conducted in the future, at intervals of 6-18 months. In some cases, the patient himself can determine whether he has retained sensitivity to milk, this is an accidental or intentional reception milk. If we know from history that the patient in the past a marked sensitization to milk, the samples must be conduct only under medical supervision in order to provide assistance in case of need.