I suspect you can get the same results by drinking water and eating a balanced diet. The military used salt tablets for years, thinking it would help the men stay strong in hot weather. Turned out the tablets did more harm than good. Now they rely on water consumption and salting the food to taste. In hot weather with vigorous exercise, a person may need to drink as much as a quart of water an hour. I served as support corpsman to a Marine Reserve tank company in the early "80's. I went with them to 29 Palms Cal. in August 1980. I found when I drank a quart of water, my skin would grow cool for about 10 minutes. This meant I had resumed sweating. I was always on the verge of heat syndrome. All I did was drink a quart an hour and salt my food. Never got into trouble. BTW, the high temps were in excess of 140 degrees F.