How much salt is absorbed in the intestines (small and large)? Isotonic vs Hypotonic

Greetings everyone, I've been trying to do some research on whether or not salt is absorbed in the large intestine, and the reason I ask is due to the way the body processes it. My limited understanding so far is that salt (ie sodium) is absorbed in the large intestine, and I was lead to believe that an isotonic solution should mean none is absorbed. Some results say there's hardly any absorbed, but how's that the case if that's where sodium is absorbed in everyday digestion? Is it only if food is mildly salty it gets absorbed?

My second question is if the water is more hypotonic and you absorb the water into your body, does the salt in that water carry over as well, and could large amounts carry over with large capacity enemas? I took a very large one the other night and I wasn't able to get it all out, leading me to think (not experienced) that it entered my small intestine, about a liter or two according to my scale. I had peed a great deal the other night, adding only 5g of salt per litre as opposed to 9g.

I'm really trying to keep my salt intake limited but plain water enemas have always made me dizzy, and I'm really hoping I can continue to do them without worrying about flooding my body with excess sodium every time.

Thanks as always

The absorption is in the direction of the lower salt content, so an enema with no salt is absorbed in the largest amount and that water enters the blood stream and can cause edema. On the other hand, if the enema is saltier than the blood stream you will absorb water into the bowel. The extreme of the absorption is with Epsom salt in which case you will continue to absorb fluid into the bowel and you will continue to pass recuring watery movements until the salt is flushed out completely.

What about people who have to limit their salt intake? Should they or should they not add anything to an enema in the way of salt content?

If the solution is isotonic, meaning it has approximately the same salt content and therefore the same osmotic pressure, it is not absorbed by the intestine. If you use sodium chloride or baking soda it is about the same amount, in reality you need to use about 1g more of backing soda. In general use 8-10 g per liter of water in the enema.