1. Why does milk powder easily cause constipation? 2. How to choose milk powder that is not prone to constipation? 3. Which brands of milk powder are not likely to cause constipation? 4. How to prevent infant constipation? 1. Why does milk powder easily cause constipation? 1. Lack of fiber: Milk powder does not contain fiber, and fiber is an important substance that helps intestinal peristalsis. 2. Protein content is too high