Usually protein powder and milk are not recommended to drink together for the following three reasons: First, protein powder belongs to animal protein, milk also belongs to animal protein, drinking together will lead to excessive protein overdose, but will cause digestion and malabsorption, such as bloating, abdominal pain, constipation, heartburn and other situations. Second, protein powder and milk together, will cause the gastric mucosa acid reflux and stimulate the effect of gastric mucosa, such as nausea, regurgitation, acid reflux, heartburn and other conditions belong to the protein powder and milk at the same time, and trigger excessive secretion of gastric acid caused by. Third, such as protein powder and milk together with the intake of too much, but also cause excessive caloric intake, a long time drinking will cause obesity.