My 6 year old son drinks one full cup milk (usually cow milk) everyday as breakfast, in that we mix 1 teaspoon protein powder (amway nutrilite -all plant), is it safe and may we continue to give the same to him or is it going to do any harm in long run. Reason for asking this question is my son is very active (not hyper), talkative, we have lot of problem in making him sit and do his studies. He lack concentration and focus is this something to be worried?