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You’re about to hear something that could change the way you look at your training, your gels, and maybe even your grocery cart. Here’s the kicker: more than two-thirds of your immune system is stationed along your intestinal wall. Yep — your gut is basically your body’s biggest training partner, though it never shows up on Strava.

Discover how groundbreaking research is rewriting the textbooks on sodium and sports performance. Learn about your body's secret salt storage system that could completely change your nutrition strategy.