Mild dehydration can harm your brain, your joints, your heart and age you more quickly than you’d imagine. But what’s the best drink to replace those lost fluids without running to the toilet all day? You might be surprised…

Are Americans chronically dehydrated? The idea of that is making electrolyte drinks and powders hugely popular. Is there any truth to it or is it just a good marketing gimmick with questionable results? Here’s what the doctor says…