Like most of us, my body was malnourished when I got clean. First, I gained weight (something like thirty pounds). Then I lost weight (went down to double digits). Now, I'm about the same weight I was in my early 20s (I'm now 40). I don't eat meat or much refined sugar.
Honestly? Like cc said, unless you replace drugs with food, your weight should settle at what's healthy for you.
Peace & Love,
Sugah