It is best to check first with your baby's health care provider. Some fussiness and irritability are normal for newborns. If you choose to give your baby a soy product, an important distinction is in order. Be sure to choose a soy infant formula, not soy milk. Soy milk is not nutritionally adequate for infants.
Protein hydrolysate formula.
For infants who come from families with a strong history of milk allergy, an alternative to standard formulas is a special cow's milk formula known as protein hydrolysate formula. Although more expensive, protein hydrolysate formula is less likely to cause allergic reactions because the proteins in it have been broken down in a process that mimics digestion. Soy formula is generally not recommended for infants who are allergic to cow's milk formula, because a large number of infants allergic to cow's milk are also allergic to soy proteins. Whatever type and form of formula you choose, proper preparation and refrigeration are essential, both to ensure the appropriate amount of nutrition and to safeguard the health of your baby. New babies have few defenses against germs, as it takes a while for your baby to build up immunity.