Field Test: Nuun hydration tablets excel at keeping you hydrated on short or low intensity outings, but to optimize hydration during hard efforts you need a little sugar in the mix. (The right blend crosses the stomach wall faster.) That’s where the new Plus for Nuun comes in. Drop two of the fizzing tablets in with your favorite flavor Nuun tab for serious efforts.
Why It’s Timeless: Nuun tablets have “effervescent technology,” so my GI system absorbs carbs and electrolytes faster.
Endurance Factor: When Nuun tested Plus on athletes, they found 5.7 percent increased time to fatigue; 1.8 percent lower heart rate max, and 0.2 miles per hour faster running. $7; nuun.com —Olivia Dwyer
From the Early Summer 2015 issue.