Hi Daisey. I was thinking that I had not heard of this and was just going to post you encouragement. But then I remembered that I had stretch marks on my obese body before I started fasting this year and went to check them out. I did have quite a lot around my hip areas and across my belly very similar to what I've seen on woman who have stretch marks after having a baby. My first wife actually told me after she got them that they were scars that would never heal and no creams etc had ever been proven to be able to heal them. So after putting on the weight I thought I had them forever and never gave them a second though. They are all but gone now, so much so that I almost questioned my memory of them having been there in the first place! However I pulled the skin tight and saw the old scars still there, just very faded and hardly noticeable, and pretty much invisible otherwise. So I'd say it's definitely worth a shot.
I also have a few scars on my body if not very many. All are faded and hard to find now but I can't say that fasting caused that because I don't examine them too often.