The Salty Truth: How does salt affect hydration, positively and negatively?

This question reveals a common confusion about basic human physiology and nutrition. A content piece could explain the role of electrolytes (like sodium) in the body's hydration process, why too little can lead to dehydration despite drinking water, and why too much can also be detrimental. This is practical, health-focused information highly relevant to athletes, health enthusiasts, or anyone trying to optimize their well-being, providing a clear scientific explanation to a widespread query.