on April 05, 2014
at 10:21 AM
Absolutely the pollution of the body of water it was in, is the reason. Compare the time of their existence in the water to the lives of fish, and remember that it is generally accepted that the more a fish lives, the more toxins it accumulates.
And it's questionable whether processed and maybe even processed salts with additives or sea salts are better than the other for this reason as far as I know.
And this is for myth debunking of reducing sodium(basically, salt) intake suggestions, and actually it's mostly for processed salt with additives also since the main source of sodium is that in any given population: