How Does Fasting Compare to Starving? At SatietyToday, we help people who are interested in satiety and hunger by collating information and news about satiety. Food is a necessity, and it is the fuel for our bodies. Not only does it provide us with the necessary nutrients, but it is also a source of comfort. Even though food is critical to our survival, it is important to know when to fast or when to stop eating completely. It is best to speak with a healthcare provider before beginning any fast so that you can safely follow your plan.