I’m currently at 38 hours, and it’s been pretty easy. I’ve being fasting for years now and only just starting the longer term ones. The last two I stopped at 3 days because I was vomiting and I was worried, but this time I’m going to break with a meal (if I start feeling nauseous) and then get right back to it.
I don’t usually feel bad until 55-ish hours, so I’m hopeful!