The guiding principle behind the new hydration index is that some fluids last longer in your body than others, providing more hydration. But now, a new “beverage hydration index” provides evidence-based suggestions for how to most efficiently hydrate. The results showed that four beverages — oral rehydration solution, like Pedialyte; fat-free milk; whole milk and orange juice — had a significantly higher hydration index than water. The first three had hydration index scores around 1.5, with orange juice doing slightly better than water at 1.1. PhotoMost Americans have heard that they should drink eight glasses of water a day to stay hydrated, but there is surprisingly little data to support this advice.

Source: New York Times June 30, 2016 15:45 UTC