Liquid I.V., Nuun, LMNT: Do electrolytes help with hydration?

Look around: Does it seem like everyone has been pouring little packages of electrolyte into their beverages lately? Pre-workout, post-workout, without a workout at all? Powders and tablets like LMNT, Liquid I.V., and Nuun are everywhere, from TikTok ads to your office snack counter.

The concept…