It's more like next time there's a really hot (or cold) day and you DON'T feel energized and great and don't adapt, that you have a marker of systemic deficiency - certainly of magnesium and most probably of potassium too. We're conditioned to accept not feeling good in the heat or the cold as being almost like having blonde or brown hair, and yet not everyone has that response. Our nutritional deficiencies are also masked by things like heating or air-conditioning... A Bloody Mary as a remedy? Yes please. :)