NASHVILLE, Tenn. (AP) — Social media is filled with influencers rating electrolyte supplements or even telling followers how to make their own. But experts say many of the claims about the health benefits of these drinks need to be taken with a grain of salt. Electrolytes are electrically charged substances that help regulate chemical reactions in the body. In the context of hydration, they balance fluid levels inside and outside of cells, said Julia Zumpano, a registered dietitian at the