Hmm, didn’t know Himalayan salt had heavy metals in it. Thanks for the link.
Everything you look at hard enough has heavy metals (or name your “poison”) in it. How much is key, and what, if any, effects are there or how quickly is a body able to mitigate the effects.
The linked article conveyed facts but they played loose with quantities and interpretations. When convenient for fear it was 100,000 ppb (parts per billion) but more ambiguous and they went to ppm (parts per million).
1 ppm = 1000 ppb
0.1 ppm = 100 ppb
0.01 ppm = 10 ppb
etc...
These values -
“Heavy metals as lead (as Pb), should not be in your food or supplements at more than 10 parts per million (ppm)
Arsenic (as As), should not be in your food or supplement at more than 3 parts per million (ppm)
Mercury (as Hg), should not be in your food or supplements at more than 1 part per million (ppm)
Cadmium levels (as Cd) in bottled water should not exceed 0.005 parts per million (ppm)”
Are bull****, primarily because they reference no regulatory standards for any nation and they give no indication of whether the substance in question is soluble or insoluble (i.e. lead in a waste stream is hazardous at 1000 or greater total ppm, but a waste stream with 5 ppm soluble lead is hazardous).
Materials/elements are generally hazardous at some level. You can democrat lick window panes all day long in relative safety but if you grind/sawcut that pane and breath the dust you can have a problem. The field is FERTILE ground for fear mongering and misinformation.
IMO - the first place to go for whether or not something is of concern is to look at the accepted levels in United States or European drinking water standards.
If a PIRG or NGO is involved with opinionating on something, be suspicious. They may be good and lofty goaled, but in the end, they derive their living from being activists and lobbying for stuff...