Your child's body must work to process these drinks and they obtain little or no benefit from them. Similarly, too much milk can be problematic. Don't load up on milk - drink in moderation. And if you are susceptible to sinus headaches or your child gets frequent earaches, try going without milk for a couple of weeks. You may notice a decrease in symptoms.
Milk is a mixed blessing.
On the one hand, it is a source of protein and calcium. On the other hand, the proteins are designed for a calf and are larger than those designed for humans in breast milk. Think about the difference in size between a calf and a human baby. Many people have trouble digesting these larger proteins which may lead to many uncomfortable symptoms like sinus headaches, earaches, and digestive disorders. There is considerable debate over the safety of this hormone in humans.