Level 1: Why does baby milk powder need to be changed frequently? Infant milk powder is an essential source of nutrients for the baby\’s growth, but why should it be replaced frequently? The main reason is that as your baby grows and develops, his nutritional needs are constantly changing. Newborn babies need formula milk powder that is high in protein, low in sodium, and low in minerals. As the baby ages, the nutritional content and proportions will also change. In addition, switching to milk powder can also avoid problems such as allergies or indigestion caused by a single formula. Level 2: How to determine the time to replace milk powder? Generally speaking, it is recommended to