Sodium

Sodium is the mineral that gives your life its flavor. Without sodium, blood tastes of nothing. Without sodium, no cell holds its water, no muscle contracts, no nerve conducts an impulse. Sodium is not a minor micronutrient — it is one of the most fundamental substances in your body. The earth has written it into its oceans. Every tear you cry carries its taste. Every drop of sweat you lose carries it away.

When your sodium level falls, more than just a lab value falls. You become tired even though you have slept. You get headaches you cannot explain. You feel nauseous, confused, your muscles cramp, your thinking grows sluggish. In severe cases, a state threatens that is serious — up to and including loss of consciousness. That is not a detail — it is a body telling you: I lack the salt without which I cannot function.