I get told that the Atkins diet is bad for me, so I do the carb diet instead, feel dreadful, ache and sleep until I get fed up of near death experiences, start back on the salads, veges, fish eggs meat, feel great and go out to jump on the trampoline or ride my bike after two or three days depending on the weather. The best thing is that my fingers stop feeling like a bunch of bananas and become deft and supple again - it creeps up slowly when I eat complex carbs.

I think that Vitamin D is a fat soluble one, it is very important as we age. A portion of liver once a week is no bad thing, I would say.   

I don't use salt - when I do get cramp, which is not often, I find that I can get rid of it in a few minutes by drinking a pint or two of water.

Maybe I just work the wrong way round, but I suspect that it is the medics' understanding which is faulty.