The goal of fasting is to draw nearer to God. Biblical fasting always has to do with eliminating distractions for a spiritual purpose; it hits the reset button of our soul and renews us from the inside out. It also enables us to celebrate the goodness and mercy of God and prepares our hearts for all the good things God desires to bring into our lives.
Remember, your personal fast should present a level of challenge, but it is very important to know your body, your options, and, most importantly, to seek God in prayer and follow what the Holy Spirit leads you to do. (Scripture References: Matthew 6:16-18, Matthew 9:14-15, Luke 18:9-14, Acts 27:33-37, Nehemiah 9:1-3)