Yes, I’ve do 24,48 and 72 hour fasts regularly and I love them, they all feel like I’m rebooting my system. But I have to gage where my body is at and where I am in my cycle. It’s important to listen to your body’s responses and stay hydrated. Sometimes i coast through them, other times I have to cut them short. BTW… I only do the 72 hour one twice a year.