some more on Saltwater

Chrisb1,
Nice summary! I like it.
I agree that for many people, there is caution to be applied.

I disagree somewhat on the danger level, though, under normal circumstances.
I believe most of these scenarios can take place in a case of impaired kidney or heart function, or high blood pressure. And possibly in cases of profoundly dis-regulated and backed-up intestinal work/content.

I agree that fasting is not a good time for experimentation and first-time trial (as per my own experience below, as well)

However, Ayurveda has a tool kit of nice cleansing practices, which are worth considering on a case by case basis.

Kmg,
My first encounter with the effect of salt water was on the border of the Black sea. Black sea is where I grew up. It is impressively known to have exactly 0.9% of sodium chloride concentration - the same as human blood (I'd think dog's blood too). I was with my dog, a healthy agile 4-year-old boxer, who at some point got extremely thirsty (it was hot, we were there for hours and had finished our drinking water). He, then, disobeying drank all he could fit in his stomach quantity of sea water. Lol. In an hour or so, he got the most humongous diarrhea I've ever seen in my life. Quite a thing. It continued for a while - enough to splash on our way back, all the car floors with partially digested bones, chicken legs and all he ate the last 2 days.

Later, I followed some Ayurveda scripts in my adolescences (I was already into yoga at that time) and I remember the first attempt was unsuccessful - 1 tea spoon salt in 1 liter of water - no cleanse happened and the urine volume was big during this day. I think, back then eating mainly grain and dairy I was significantly backed-up, plus I already have had the appendicitis surgery and adhesions after it.

BTW Ayurveda has some cleansing practices that a regular Hygienist would find drastic. I would argue, this is the case since in the West many more people have their elimination systems impaired and not working properly.

The second attempt (I don't quit easily, Lol) I did as per my pharmacy's prescription: 30 g of Epsom Salt (which is about 6 teas spoons) in 1/2 liter soda. The cleanse went over board. I could not get out of the washroom. Lol. Later that day my stomach was not only flat, but caved in; nothing left in my abdomen, beside empty intestines.

This to say, I am not in favor of more drastic measures like the former.
In the case of table salt (hoping no aluminum was added in the factory) - 1 tea spoon per liter is with a concentration of zero point .9 % which is the salt (sodium chloride) concentration of human blood. It has also pH 7 which is neutral. Therefor, no interference other than having 1 more liter of fluid in the system. It is not absorbed instantaneously, so it either follows its way through and out of the digestive tract, or it is absorbed in 2-4 hrs (as per my own experience).
IMPORTANT: I agree, that for people with kidney impairment, failure or heart failure this may challenge their functioning. In such people, though, climbing up the stairs or drinking more than 250 ml of water per day also upsets their balance. I believe, such people would not attempt any of these cleanses.

A sterile sodium chloride solution with pH 7.4 is usually what ER and hospitals use in case of low
BP or volume depletion - intravenously.

Now in my case in December, the flush with Andes minerals was of the same concentration per liter, but with a pH of about 8-9. I don't believe this pH would be a problem for a liter of liquid taken per mouth, since so many anti-cancer therapies now use such pH to combat cancer in very impaired patients, in which possibly many systems do not function properly. I also drank additionally about 1 liter of distilled water, as per thirst during the next 2 hrs.