Question

Salty snacks like peanuts and pretzels can often be found for free at gatherings where beverages are for sale. Vendors hope that the salty snacks will make consumers thirsty so they will purchase something to drink. Why does this work?

Answer 1

This works because the salt causes our body to retain fluids in our interstitial spaces and making our kidneys pee out the rest of it. It causes us to feel dehydrated and need more fluids.