Jesus says, “When you fast, do not look somber as the hypocrites do, for they disfigure their faces to show others they are fasting. Truly I tell you, they have received their reward in full.”
Jesus expects us to fast. Adding fasting to your prayers is incredible and shows a reliance upon God and a deep humility. If you have never fasted or it has been a while, give it a try and see how God blesses it.