In the process of using formula to feed your baby, many times because of the open formula in a short period of time can not drink and the phenomenon of lumps, open formula up to 30 days, it is best not to let your baby eat again within 21 days. The baby will be affected by oxygen and microorganisms after it is opened, and it will become agglomerated or denatured, making the nutritional value drop significantly, and giving the baby milk powder that has been opened for too long will easily lead to lack of nutritional elements and indigestion. The actual milk powder will be detailed on the package, so don’t consume more than the shelf life after opening.