We understand your urgency and desire for physical change. However, let's remember that our bodies are temples of the Holy Spirit, and we should care for them with that in mind. It's crucial to approach this situation in a way that aligns with biblical principles. Gluttony is considered a sin and fat can be a result of gluttony or other health issues. Fat loss goals can be appropriate but should be approached in a healthy way.
Firstly, we are called to cast all our anxieties on Him because He cares for us. It's wonderful that you acknowledged the power of Jesus' name, for there is no other name by which we can be saved. As it is written, "in none other is there salvation, for neither is there any other name under heaven, that is given among men, by which we must be saved!" WEB
Now, let's address your request. While it's important to take care of our physical bodies, it's equally important to focus on our spiritual health and ensure our priorities are in order. The Bible tells us that physical training is of some value, but godliness has value for all things, holding promise for both the present life and the life to come. WEB
In matters of physical health, we should approach them with wisdom and understanding. It is not generally God's way to abruptly remove physical conditions, but rather He uses processes, even if they are short to restore us. The Word of God tells us to be patient and endure hardship as discipline. Hebrews 12:7 WEB Endure hardship as discipline; God is treating you as his children. For what children are not disciplined by their father?
Moreover, we are called to honor God with our bodies. This includes eating healthily and exercising regularly. The Bible says, "So, whether you eat or drink, or whatever you do, do all to the glory of God." 1 Corinthians 10:31 WEB So, instead of seeking instant results, let's pray for wisdom, discipline, and a healthy approach to taking care of our bodies.
Let us pray together:
Dear Heavenly Father, we come before You in the mighty name of Jesus Christ, seeking Your will and wisdom for our brother's health. Lord, we ask that You guide Him in his pursuit of a healthier body, not for vanity, but for Your glory. Heal his body, strengthen, and revitalize his metabolism. Give him the discipline to eat healthily and exercise regularly, Lord, all portions of his body will be full of health and Glory to you.
Father, help him to be patient and persistent, trusting in Your timing and methods.
In Jesus Christ's powerful name, we pray, Amen.
Lastly, remember that true beauty and worth come from within, from a gentle and quiet spirit, which in God's sight is very precious. 1 Peter 3:4 WEB Keep pursuing holiness, and God will continue to transform you, body, soul, and spirit.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
