From all the books by doctors on water fasting. Starvation does not start to occur during fast even in a person that started off skinny, until past the 40 day period. As far as facial muscle, are you kidding me (by smile on my face on that one). You will look so chizel face after a Water Fast of at least 28 days compared to before. I went from fat to cut during my first fast and I had such a shape on my face I did not believe that I was even this chizel during high school. So I looked at some pictures from that time. Sure enough I was very right! YOUR FACE WILL CHANGE BIG TIME! For the good! bye bye fat at a bigger rate than muscle. Even my nose was smaller. I'm black so I think I can get away from this, but you know how a lot of us have big flatten shaped noses? Well imagine that getting much skinnier. It is still the black shape but not ovenly so like before the fast. One thing about that fast I think I love the cosmetic parts as much as the healthy parts-benefits of it.