The stomach is not a good judge of whether you should be eating more or less food. For whatever reason, some individuals may be prone to overeating or undereating. If your natural eating tendencies have caused you to be over- or underweight, common sense says that you should stop listening to those natural urges. The key to successful dieting is to transform eating from a biologically-mediated process into a cognitiv…
I'm sorry, but that is not a marginal effect. That is the difference between weight gain and weight loss. Also, if you read the article you would have noticed that a calorie deficit is not the only thing that necessitates weight loss, in fact, it might not help at all. There are good calories and bad calories, and how your body handles each depends on the source of the calorie.