The issue is calorie-dense vs. calorie-sparse, nutrient-rich foods. Consuming large amounts of calorie-dense food is what should be avoided. Butter, oils, sugar, and red meat are the primary culprits. Our society is far over-fed these types of foods. What we should be eating more of is calorie-sparse nutrient-rich foods such as squash, yam, spinach, broccoli, eggs, blueberries, brown rice, plums, peaches, apples, oranges, onions, garlic, etc etc. Of course, the body needs protein such as ham, shrimp, chicken, turkey, fish, small amounts of red meat and pork. NO ONE should EVER eat pizza or donuts or chips or cookies or anything like it. Cheese is one of least healthy foods -- extremely calorie-dense, mostly saturated fat. I started on this type of diet about 3 months ago, and with moderate cardio exercise, have lost 26 pounds such that my weight is 10% below my "ideal recommended" weight which I think is overstated by the medical community.