by Andre Heeg, MD, DDS I'm a Doctor. I Know Exactly What Ultra-Processed Food Does. My Kids Still Want KitKats. Karla walks in from school and drops her backpack on the floor. I open the lunchbox my wife packed this morning. Bell peppers, cucumber, avocado. Biltong, which has become a family favorite since we arrived in South Africa: dried meat, sometimes beef, sometimes ostrich, sometimes game like kudu or springbok. Apple slices and a plum. Dried dates for dessert. More came back than...