Also known as: Sodium Chloride, Table Salt, Electrolyte Sodium
Sodium is an essential electrolyte that regulates fluid balance, nerve impulse transmission, and muscle contraction. While critical for survival, most populations consume excess sodium, making supplementation rarely needed outside of specific clinical or athletic contexts.
Sodium is the principal extracellular cation, essential for maintaining osmotic pressure, acid-base balance, and the electrochemical gradients required for nerve and muscle function. The adequate intake is 1.500 mg/day for adults, while the typical Western diet provides 3.400 mg or more. Chronic excess sodium intake is strongly linked to hypertension and cardiovascular disease. However, sodium supplementation has a legitimate role in endurance athletics (to prevent exercise-associated hyponatremia), clinical rehydration, and conditions like postural orthostatic tachycardia syndrome (POTS). The evidence for sodium as a general supplement is limited because the primary public health concern is overconsumption, not deficiency.
During prolonged endurance exercise, sodium supplementation helps maintain serum sodium levels and prevents potentially fatal hyponatremia caused by excessive water intake and sweat losses.
Sodium drives water absorption in the intestines and kidneys, making it essential for oral rehydration solutions used in dehydration management.
During exercise, dissolved in fluid or as electrolyte capsules
Adjust based on sweat rate, heat exposure, and individual sweat sodium concentration.
Athletic performance and rehydration
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