How to correctly choose the ingredients of three-stage milk powder suitable for your baby. With the development of science and technology and the improvement of living standards, more and more babies are growing up drinking milk powder. However, there are many varieties and ingredients of milk powder. How to choose the ingredients of milk powder suitable for your baby? Let’s explain it in detail from 4 aspects. 1. Baby\’s age group The baby\’s age group is an important basis for choosing milk powder ingredients. Generally speaking, babies aged 0-6 months should choose protein-based formula.