Even I have fallen into that, even though for me it was just food and regular pop. I noticed at the hospital and support groups a good number of people said they had substance abuse issues. Also the people who talked about poor hygiene, not showering or changing underwear for days. Then the doctor I hate said something about the fact I grew a beard during this was a sign of depression and lack of personal care. Another thing that offended me at the time, because frankly a beard is as much maintenance as shaving. I almost laugh at that now, because I've had compliments on it, especially from a number of the ladies in my office building. 
I know the poor hygiene happens as a symptom, but personally grosses me out. Even in my worst fear and despair, I would have felt even lower if I didn't take 2 daily showers, brush, floss and water pick, and I'm big on "product" for my hair. And I felt pretty lost, but never lost enough to go down that path.
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