So, RO water is basically water stripped of nearly all its minerals and impurities. It’s the cleanest water you can get, like a blank slate. The worry is that because it has no electrolytes (like sodium or potassium), your body won’t absorb it properly and will just flush it right out.
Here’s the thing, and it’s a big one: water does not need electrolytes to hydrate you. Think of your thirst like a dry sponge. Even the plainest water—including rain or distilled water—will wet that sponge immediately. Your cells don’t demand a little salt shaker to let the water in; they just happily soak it up.
The confusion comes from a real phenomenon called hyponatremia, or water intoxication. But you get that from drinking gallons and gallons of any water, not just the RO stuff, in a very short time while sweating heavily. It is incredibly rare and has nothing to do with the Friday night glass of RO water next to your couch.
