However, not all salts are the same (see this article):
- sea salt - evaporated directly from sea water
- rock salt - mined from deposits of salt from old seas (where sea level has changed)
- table salt - sea salt or rock salt that is refined to almost pure sodium chloride with optional added iodine
According to this article, the composition of salt is important:
Unrefined salts, whether mined from the earth or harvested from the sea, contain a broad spectrum of trace elements, often in the same balance as are found in human blood. These include magnesium and potassium, necessary for health and which help the body metabolise the sodium better. Indeed, potassium and magnesium work synergistically with sodium to regulate water balance and nerve and muscle impulses.
Back to the salt. If the choice is between Himalayan rock salt and Spanish sea salt, I was still really confused about which salt to buy, as neither are local and I wasn't sure if rock was better than sea. Turns out that the main difference between the two is that sea salt is more likely to contain contamination from sea pollution, whereas the rock salt, coming from old seas prior to pollution, is more likely to be clean. So I was sold on the rock salt idea, but I wanted to find something more local... you'd think that hot dry Australia would have some kind of salt to be mined!
And that's when I found Murray River Salt. This salt is a bit different again, its evaporated from a saline aquifer, so its old salt like the rock salt, but it doesn't have to be mined. Even better, this is saline water that would otherwise end up in the Murray River. I don't know how much of a difference it really makes to the salinity problem, and I still think that Peter Andrews has the right idea about how to deal with the wider issue, but in the meantime, on balance this company is surely doing more good than harm. AND they are located in a rural area and creating jobs there, which is fantastic.