Diarrhea causes dehydration, and that can kill you. If you drink a lot of water to treat the dehydration, you wash all the salt out of your body, and your brain and heart stop working. Eventually we figured out a precise way to make weak saltwater so it’ll still hydrate you some and will also replenish the salt it washes out of you. Giving someone a bunch of precisely made saltwater to treat diarrhea is called “oral rehydration therapy” and it’s a big part of why people with access to medical treatment rarely die of diarrheal diseases anymore.
Latest Answers