Our needs concerning food come from the fact that we need food to live. As a result, our bodies have developed a system to ensure that we get enough to support survival.
The natural physiological response to getting too hungry, which is what often happens with dieting, is that a person is attracted to richer foods and tends to eat more quickly. The result is that we often pass the point at which we feel as if we’ve had enough to eat before we realize it. If we have been on and off diets, the typical response is to also feel guilty that we’ve eaten richer foods – which typically aren’t allowed on a diet – and that we’ve eaten “too much.” This sets off a downward spiral of thinking that can lead to repeated dieting and overeating that causes a person to gain weight instead of lose it.