Nan, by Nestle, HA 1 is a premium partially hydrolysed starter infant formula . Nan 1 HA is hypoallergenic formula for babies from 0-6 months and it is recommended for babies who could be prone to having allergies, but not necessarily, it can be used for other babies too . Manufacturers says that is best for your babies to give only one kind of milk, and when you change your formula to go to the n...