Another Christian here.
I don't think God minds if people turn to medical help in dealing with alcohol or drug addictions...or cigarette addictions. My thought is, why should food be treated any differently?
If there is medical treatment available, and it leads to better health for you, I do not see a conflict in your faith. I see it as very different than plastic surgery for purely vain purposes.
I am not a very good scripture-quoting person, but have strong faith. I hope perhaps some of this makes sense.

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Mousecrazy
Banded 7/22/05 by Dr. Marsden, Lewisville, TX
286/200/180 goal
1st fill: 8/25/05 .5cc
2nd fill: 11/10/05 .2cc
3rd fill: 7/27/06 .6cc