Romans 8:13 For if you live according to the flesh you will die but if by the Spirit you put the flesh to death, you will live.
One of the best things fasting does is it allows God to dig deep into our lives and uproot the things that don't belong. By denying our selves during fasting, we are putting our flesh to death.
Romans 7 shows us that inside we have the flesh man and the Spirit. The more we feed the Spirit the more we kill the flesh. Fasting with prayer allows to kill the flesh and give room to the Spirit. And “those who are led by the Spirit are the children of God.” (Romans 8:14)
Pray for those who need physical healing, including those with long term illness, those who are undergoing tests and investigations. Pray for those suffering mental illness, anxiety, depression and fear, and for deliverance from substance addiction.