Many of us can’t readily digest milk. In my case, it seemed to lead to chronic heartburn.
O.K., dairy products contain nutrients, and for those who like them, a serving or two daily is probably fine. (Worth noting: they’re far more easily digested as yogurt or cheese than as fluid milk.) But in addition to intolerance, there’s a milk allergy — the second most common food allergy after peanuts, affecting an estimated 1.3 million children — that can be life-threatening.