Everytime I read about the horrors of dysentery and typhoid--resulting from poor sanitation and poor drinking water, it drives home the fact that many people die each year because of the terrible diarhea that afflicts them. This is highly likely in the case of a post SHTF world. When you lose a massive amount of fluids from your body, you lose electrolytes. Those electrolytes enable your nervous system to give orders to your muscles (heart--keep beating, please). That is why afflicted people have great general weakness and they ultimately die from this. I have a case (powdered tubes about the size of your finger) of Zip-Fizz. This is sold in cases of 30 and it is not expensive. Also, it has NO SUGAR and very little salt. But it tastes pretty good; one tube can mix with 12 ounces or with a quart--it tastes good either way. You are not fully protected if you do not have something to provide electrolytes in case they are needed.