[elric]

> UK here for context. We only have to fast for 12-24 hours prior to the colonoscopy. You can drink water or plain tea (no sugar, cream or milk).

Are you saying you only have to fast, without laxatives/prep? How does that work? I find it hard to imagine that anyone's colon is clean enough to get a good view after only fasting for a day?

[ben_w]

Based on how much my need for toilet paper depends on what I’ve been eating recently, I suspect diet makes a massive difference to how clean you are inside.

Not sure how waiting longer than 24 hours is going to get you much cleaner in any case.

[JMS2021]

We have to take laxatives as well. The night before the appointment usually. That's when you must start fasting.