Scriptures does not command christian to fast. God does not require or demand it of Christians. At the same time, the bible presents fasting as something that is good, profitable, and beneficial. The book of act records believers fasting before they made important decisions (Act 13:2; 14:23). Fasting and prayer are often linked together ( Luke 2:37)
Too often the focus of fasting on the lack of food. Instead, the purpose of fasting should be to take your eyes off the things of this world to focus completely on God. Fasting is a way to demonstrate to God, and to ourselves, that we are serious about our relationship with him. Fasting helps us gain new perspective and a renewed reliance upon God.
By taking our minds off the things of this world, we can more successfully turn our attention to Christ. Fasting is not a way to get God to do what we want. Fasting changes us, not God. Fasting is not a way to appear more spiritual than others. Fasting is to be done in a spirit of humility and a joyful attitude (Matthew 6:6-18).
And this, “when you fast put oil on your head, wash your face, so that will not be obvious to men that you are fasting, but only to the father who is unseen; who sees what is done in secret, will reward”.