Many Americans tend to overeat.
The experience of food satiety is mediated by a variety of physiologic signals, psychological states, and cultural factors, and some of that signaling may have some genetic tendencies. However, it is my experience that the main causes of overconsumption are three simple things: the ready availability of tasty carb things (unresisted temptation), feeding+sitting as recreation, and ignoring satiety. By the latter, I mean not paying attention to when enough is enough. In our world, there is always more, and gluttony, eating until "full," makes no sense at all on a routine basis.
In other words, ignoring your body's "enough" signals instead of one's maximum stretched stomach capacity. Some people will consume whatever is put in front of them regardless of hunger, while some will only consume until they sense that they have had enough. The former two are the buffet-killers while the latter do not consume their cost of the buffet. Living in a world of food abundance has a downside but nobody would choose the alternative.
I have found that overweight people can be easily trained to identify satiety if they want to. We know a few things about this:
1. Protein seems to trigger satiety best.
2. Fast eaters tend to ignore their satiety signals far more than slower eaters. That's why it's called piggish.
3. Food impairs mental alertness and physical capacity for a while so it's best not to eat for a couple of hours before exertion. Hydration is necessary, though. If at your ideal weight or underweight, a little carbs an hour before difficult exertion is a good idea. After heavy resistance work, a little protein, or a regular meal if at target weight, is an ok idea.
