I have yet to break 55 hours of dry fasting, but my cycle is much more regular now. I’ve never been one to suffer from painful cramps and my flow is the same, but my tracking app is now pretty spot on every month so that’s nice.
It’s made my cycle a bit shorter, from 6 days to 5 bleeding usually slows by day 4 and I don’t feel pain/cramps after the first day. I’ve noticed the heaviness of my flow remains the same and overall I can predict my cycle more accurately.