Replenishing sweat lost due to exercise, heat, or saunas: During hot weather, sauna use, or high-intensity exercise, large amounts of fluids and electrolytes (especially sodium and iodine) are lost through sweat. Replenishing electrolytes, including appropriate amounts of salt, before, during, or after exercise prevents dehydration, prevents heart rhythm abnormalities and muscle cramps, and promotes body cooling and blood circulation, thereby significantly improving athletic performance.