Reply to ClaraD
Hi Clara! Pull up a chair! I've explained how us colon-less folks hydrate so many times on here that those reading this are probably rolling their eyes right now saying ‘no... not the hydration thing again!'. But if it helps even one of us, I'm going to explain it again!
The way we hydrate is to trick the small bowel into allowing water molecules to pass through the semi-permeable membrane that is our bowel wall. Normally, while the colon does the water absorption, the small bowel is absorbing primarily glucose (sugar) and sodium (salt) and other nutrients. When the bowel wall senses the correct ratio of glucose and sodium together, it absorbs it. If the ratio isn't quite right, the bowel tries to make it right by pulling what it needs from our bodies and mixing it with what's there in our small bowel. If it can make the ratio right... it then absorbs it... and if it can't, it won't. But it's not just the ratio of glucose and sodium we're concerned with... it's also the amount of water those two things are combined with. When the stomach dumps its contents into your small bowel, it's primarily in liquid form. So the sodium and glucose are being carried through your small bowel mixed with water. Most everything we drink is water-based, so not only does the ratio of glucose to sodium have to be right, but so does the ratio of those things compared to the amount of water that's carrying them through your bowel. Are you with me so far?
If you have the right amounts of sodium and glucose, but the amount of water carrying them isn't right, the body tries to fix that by pulling water from your cells and pushing it through your bowel wall into your small bowel to raise the amount of water that the sodium and glucose are contained in. Sounds good, but the body can only pull so much water from your cells in a certain amount of time. And what's in your small bowel is constantly moving down the bowel toward your bag. So if your body can't pull and dump enough water to get the ratio right while this stuff is moving through your small bowel, then none of it will get absorbed. If we had a colon, it wouldn't be a big deal because the colon would simply re-absorb the water and send it back to the cells it came from. Sort of a ‘no harm, no foul' sort of thing. But for us, all that water just ends up in our bag (along with the glucose and sodium that couldn't be absorbed). But if the amount of sodium and glucose and water is close to what the bowel wall needs... and the body can make it right... we get the water back through our small bowel. So our bowel wall is like a lock, and the key is the right combination of glucose, sodium, and water. Get that right and the membrane that is our bowel wall does an 'Open Sesame' and sucks up the glucose, sodium, and WATER! That's how we get hydrated.
But wait... if the body had to pull water to dilute the mixture... we're not getting as much water absorbed as we can, since some of it was already in us to start with. So the trick is to give the small bowel exactly what it needs, so it doesn't have to pull water already in our cells to get the mixture right. If we do that, the small bowel wall will simply open wide and suck it all right in... including the water! Have your eyes glazed over yet?
Ok, so what's the magic formula??? Well, it's 20-25 grams of sugar (glucose) combined with 6-12 grams of salt (sodium chloride) mixed in 1 liter (quart) of water. This combination is called an Oral Rehydration Solution (ORS), and is what the World Health Organization distributes to people suffering from severe diarrhea. That's because people suffering from diarrhea have their colon inflamed to the point it can't absorb any water (from food poisoning or nasty water). So drinking an ORS allows them to re-hydrate without using their inflamed colons. And if it works for them... it'll work for us too.
Once you understand what I just explained, you can see why drinking drinks loaded with sugar cause us to dehydrate. And drinking just plain water or sugar-free drinks robs us of essential glucose and sodium. So if we don't drink stuff that's the right ratio to pass through our small bowel's inner wall... we're doing harm to ourselves.
Making ORS is easy and can be made with anything... as long as you keep the glucose, sodium, and water in the ranges I gave above. Half a 12oz can of Coke... or any non-diet soda, is about 21 grams of glucose. And ½ teaspoon of salt is about 6 grams depending on the type of salt you use. The rest can be regular water, seltzer, club soda, etc... so the possibilities are endless.
Now one last thing. Saying the colon does ALL the water absorption is a bit of a fib. The very end of the small bowel also begins to do some absorption, but the bulk of it is done in the colon. So the less small bowel you have left... the more important drinking ORS will be to you. Also, as Iggie mentioned, our small bowel will adapt over time to try to compensate for the colon having left the building. It can't fully compensate, but it does learn to absorb more as time goes on. Understand that I've seriously oversimplified the whole absorption process here, so if you want to learn more, or just get a more exact understanding of what goes on in this whole process, there's lots of info online... and I can point you to it if you'd like.
So... the bottom line is 20ish grams of sugar and ½ teaspoon of salt (about 4 or 5 salt packets you get at any restaurant or fast food place) mixed in a liter/quart of water or sugar-free anything... and you're golden. If you can't do that, then the closer you are to it, the better. Any questions, just shout!
;O)