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GS, come SHTF, I imagine most of us will be doing more physical labor than we do now. In summer heat dehydration is an ever present danger. For me at least, becoming salt depleted is an issue as well. Not sure why I get salt depleted quicker than others but I do if I sweat a lot in summer heat. I add salt to most any food all the time. When I used to go for long bike rides (100 miles or so) I would take salt tablets proactively in hopes of avoiding charlie horses during or after the ride. You can buy salt tablets in most pharmacies very inexpensively