I would never be able to fast if I weren't in deep ketosis. I haven't been hungry for a very, very long time. IF (The original Fung Protocol, before the first book) helped me break a 6-year plateau. IF for me included as much bone broth as I felt needed.

Since that initial IF (2015) I've used Time Restricted Eating (TRE).

I'm an aged female and success is different for me than for many here on this forum. My aim is optimal health and mobility and maintaining my weight loss.

We are all different in our needs and have to experiment to find the best way forward toward our individual goals.