Okay, this might be TMI (too much information), but I thought people might be interested. Also, it reveals a lot about how well-suited a carnivore diet is for humans.
So, what happens when you switch to a carnivore diet? I have heard that some people who make a very abrupt transition have softer stools - sometimes even diarrhea.
That can be because you eat need to eat a LOT more animal fat, relatively quickly, since you're not eating any carbohydrates, and you need the energy from the fat. And it takes your body a little while to ramp up the pathways to digest a lot more fat that you were eating previously, so some fat doesn't get digested.
But the diarrhea goes away, as you get accustomed to the diet.
For me, I transitioned to carnivore more slowly, over a couple weeks, so I didn't have that problem. If you don't eat enough fat, you can have the opposite problem - your stools can become too hard. In other words - constipation. That's usually easy to avoid as well.
But here's the most interesting thing about bowel movements, after eating carnivore. I would conservatively say that the total volume of stool is about 10 percent of what it was before.
I made this estimate because, after carnivore, people usually have a bowel movement every 3 or 4 days. AND - the bowel movement is much smaller. Much more compact. There's no fiber in it, and there's not the water bound to the fiber. A carnivore diet is highly bioavailable - your body can use almost everything. Whereas much of the expensive vegetables and fruits you're eating are being flushed down the toilet.
Just an interesting tidbit for your day.