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Average electrolytes lost in sweat
(1 hour of exercise)

Sodium: 1,200 mg
Chloride: 1,725 mg
Potassium: 140 mg
Calcium: 40 mg
Magnesium: 8-10 mg
Iron: 0.16-0.63 mg
Copper: 0.4 mg
Zinc: 0.4 mg
Iodine: 52 mcg
Selenium: 40 mcg
Chromium: 7.5 mcg