“Athletic drinks were created to re-hydrate athletes and replenish lost nutrients and electrolytes,” says Krysta Manning, DMD, MBA, and owner of Solstice Dental & Aesthetics in Louisville, Kentucky. “However, these health benefits often come with a heavy dose of sugars. Liquid sugars are notorious for causing cavities in hard to reach places and are even more detrimental when introduced into a dry oral environment.” Unless you’re a high-performance athlete, re-hydrate with plain old water.