It’s not often that something simple, cheap, science-backed and easily accessible trends on social media. Against the odds, #WaterTok is all the rage right now, and as a registered dietitian, I’m not mad about it. Yes, it annoys me that there are influencers trying to sell you expensive electrolyte powders that you don’t need. (Don’t even get me started on the fact that one of the most popular powders contains 1,000 milligrams of sodium, which is almost half the recommended d