It really frustrates me as a parent and someone over 40 when I realize that, even today, our supposedly well-developed civilization still doesn’t have a simple and reliable way to understand how our bodies react to various external factors or internal changes. We can’t clearly see how the body responds when we start or stop medication, face stress, or deal with intoxication, allergies, or inflammation. And we still can’t precisely predict when serious events like heart attacks, strokes, diabetic emergencies, or hypoglycemic shock might occur.