New to this. Quick question regarding what my body burns a fuel.

If I am at a high body fat % during my fast will my body start taking fat as its first fuel source? I say this as I have been working out a lot over the years and have built a good frame. It's just currently covered with some fat. Have I not got to worry about muscle loss until I start getting to low body fat %? via /r/intermittentfasting https://ift.tt/2IW49Vd https://ift.tt/eA8V8J