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You've heard it a thousand times: drink more water. It's the most generic health advice on the planet — and it's not wrong, exactly. But if you're active, if you train hard, if you spend time in heat, or if...

You drink water all day but still feel tired, foggy, and crampy. The problem isn't how much water you drink — it's whether your cells can actually use it. Electrolytes drive cellular hydration, and most people are chronically deficient.