This is for a story I'm writing that involves supernatural abilities though i often try and find some grounded effect of what would happen. One of these abilities causes the cells in a target's body to be unable to divide, replicate, regenerate, etc. I'm curious as to what the effects would be. As certain parts of the body have their cells die and replace faster than others, what happens when they aren't replaced. How long before something like this would be lethal to a target? For example, if the colon cells are replaced every 4 days, what happens when they can't?. Or if the process to generate more blood cells stops entirely. The main question of this is how long before a condition like this would be fatal and what things happen before that event.