system
Given the following post, respond as if you're commenting on Reddit:
human
Can a drink actually be “more hydrating” than just water, or is that just made up to sell sports drinks?

Basically title. How can something hydrate you more by adding electrolytes or salt? Surely the amount of water you’re putting into your body is the only measurement of how hydrated you can be? I’m torn between “I don’t know enough about electrolytes to question it” and generally assuming all marketing/advertisement is lies.
gpt
Salt, and and other electrolytes like potassium and calcium, are very important factors for hydration because they facilitate the movement of water in and out of cells. They have properties that allow them to bind to water and move it around. This is why, to be properly hydrated, you need electrolytes. The "super advanced" Gatorade electrolytes or whatever are mostly just marketing. However, you will see recommendations to eat a banana or take a shot of pickle juice to help with muscle cramps. This is why.