Electrolytes: trendy powders are not necessary for everyone

Sodium, potassium, chloride, calcium, and magnesium are among the electrolytes that the body needs for fluid balance, nerve function, and muscle contraction. Some of these are lost through sweat, but the diet also naturally provides these minerals. In a healthy person who does not sweat excessively, the kidneys help maintain this balance.

Caution begins with the label. Some powders are high in sodium, sometimes containing added sugar, caffeine, or other ingredients. The World Health Organization recommends that adults limit their sodium intake to under 2,000 mg per day, which is less than 5 g of salt. Consistently adding a salty drink to a diet already rich in processed foods is not insignificant.

An electrolyte drink is also not equivalent to an oral rehydration solution. In cases of diarrhea, especially in children, the WHO recommends oral rehydration solutions specifically formulated to replace lost water and salts. Persistent diarrhea, blood in the stool, or signs of dehydration warrant medical advice.

For light fitness sessions, a day at the office, or short physical activities, a water bottle and a varied diet generally meet everyday needs. The packets may be particularly useful when sweat loss becomes significant, such as during prolonged exertion or when working in the heat for several hours.

The CDC recommends water for moderate activity in the heat lasting less than two hours. When sweating extends for several hours, the agency advises drinks containing a balanced mix of electrolytes, while also reminding to avoid overly sugary beverages.