I imagine it depends on so many different factors. 

I tried longer fasts (for health rather than weight loss), and I loved how I felt during the fasts themselves but then afterwards my hunger signals were often messed up for over a week. I'll try again once I'm more settled with carnivore.

Do you use intermittent fasting? I don't hear the same dramatic health results but I think they probably accumulate, and a lot of people use it for weight loss. 

 I am on OMAD daily. OMAD stands for One Meal A Day. It also referred to as the Warrior Diet because it is a 23 hour fast, 1 hour to eat your meal. Yes, I am desperately seeking thinness 🙄 

 OMAD can be great! Once I can eat enough in one sitting I hope to move to that.
How is it going so far? 

 It works ;)