Silly question, I know. However, I can't say that I've ever seen this topic discussed before. Granted, people say eat tuna/chicken because it is healthier than steak, but there is no mention as to why one is a healthier option than the other. If calories are kept at the appropriate levels (will vary if one is cutting/maintaining/bulking), a proper protein/carb/fat split (I understand that there is some debate as to what this actually is) is followed and proper vitamin/mineral/efa levels are achieved, does it matter what foods are used to reach these levels? Just curious to find out if there is some rule that determines whether or not a food item is "healthy".