The composition of sweat varies by person, climate, exercise type, and diet. Some people lose more sodium and chloride. During prolonged or intense sweating (e.g., endurance sports or hot environments), it’s important to replace both fluids and electrolytes — not just drink water.
The primary electrolytes found in human sweat are sodium, chloride, potassium, calcium, and magnesium. These minerals play essential roles in fluid balance, muscle function, and nerve signaling.
