The moral issue involved in losing weight.

  Hashem gives us a body that is our responsibility to take care of.  If we abuse our body by overeating, we are going against Hashem's will.  We have a moral responsibility to take care of our body.

From a Shiur on Naaleh:  Who is the Provider

Teacher: Rebbetzin Tziporah Heller Class: Bitachon: Meaning of Trust