Perhaps while you are, or instead of fasting, you can have a dedication to health day. My faith helps me eat a healthy diet, because if you think about it, God provided us with fruit and vegetables, meat and fish, grains and herbs. He didn't put things in boxes, cartons, packets etc in the Garden of Eden.
I know all these things make our lives easier, but getting back to God and getting back to healthy eating goes hand in hand.
Prayers and hugs are with you