Trust in God is essential part of being completely well.
The proper diet is absolutely critical for recovery from every disease, but it is only one, very important part of many others.
Trust in God, spend time with Him every day, so you can get to know Him as your friend. Then you can trust Him with your life.
God is the healer. He is the only one who knows exactly what is wrong with you and exactly how to make you well.
Trust in God. He will give you the strength and courage.
"I can do all things through Christ who strengthens me". - Phil.4:13