So, I don't really understand the science, but my son is only able to drink raw milk. When he drinks normal milk, he has terrible stomach aches and mad diarrhea. When he drinks raw milk, it's all rainbows and butterflies. For reference, he's 3 and has been drinking the raw milk for around a year and a half. Also, the rest of the family had no issues drinking pasteurized milk. Maybe somebody smarter than me could explain why this is?