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Magnesium
Magnesium is especially important in athletes because it is crucial for production of energy and the mineral is lost through sweating (~0.1 mmol/L). Several other electrolytes are lost in sweat including chloride (~30mmol/L), potassium (~5mmol/L), calcium (~0.5 mmol/L).
The effect of ethanol on magnesium excretion was studied in three normal subjects. It was found that the ingestion of 2 ml ethanol/kg body weight produced a marked immediate increase in urinary magnesium excretion, but there was no significant effect on overall magnesium balance when this amount was taken daily for eight days.
