There are three distinct ghrelin peaks, corresponding to lunch, dinner, and the next day’s breakfast, suggesting that hunger can be a learned response. We are used to eating three meals per day, so we begin to get hungry just because it is “time to eat.” But if you don’t eat at those times, ghrelin does not continually increase. After the initial wave of hunger, it recedes, and it spontaneously decreases after approximately two hours without food. So, studies suggest that if you ignore your hunger, it will disappear.
