Electrolytes

Electrolytes are minerals that carry an electrical charge when dissolved in body fluids, playing a critical role in hydration, nerve signaling, muscle contraction, and pH balance. The primary electrolytes include sodium, potassium, magnesium, calcium, chloride, and phosphate. Sodium and potassium work together to regulate fluid balance across cell membranes through the sodium-potassium pump, one of the most energy-intensive processes in the human body. When you sweat during exercise, you lose significant amounts of sodium and smaller quantities of potassium and magnesium. This is why plain water alone may not be sufficient for rehydration after intense physical activity lasting more than 60 minutes. Sports drinks and electrolyte tablets are designed to replenish these minerals, but many contain excessive sugar. A more balanced approach is to eat potassium-rich foods like bananas and avocados, add a pinch of sea salt to your water after heavy sweating, and use our calculator to track your baseline water needs. Electrolyte imbalance can lead to muscle cramps, irregular heartbeat, confusion, and in severe cases, seizures. People following low-carb or ketogenic diets often need extra electrolytes because lower insulin levels increase sodium excretion through the kidneys.