The author said that junk food has gone global. junk food is now available all over the world. We see it most everywhere we go -- in grocery and convenience stores, fast-food restaurants, on television -- usually looking very appealing. Junk food "refers to food calories but little nutritional value a lot. Some may say that Pizza is junk food But I do not think so, because it contributes to real food with nutrients such as tomato sauce and cheese, add wheat or wheat crust. Plus vegetable garnish And I would say, Pizza from junk food completely. One problem with junk foods is that they're low in satiation value. The problem is that junk food is likely to replace other nutritious food more and more.