According to the article, why does Eva Selhub want people to do a gut-check?

Eva Selhub says that checking the gut before eating is very important. As the food seems the best comfort, releasing dopamine and serotonin in the brain, Selhub told that the effect of this happiness lasts very little.

Explanation:

To stop emotional overeating, a gut check is important before a snack. It doesn't mean that a person is really hungry if he reaches for a snack. He may be stressed or sad.