https://en.wikipedia.org/wiki/Himalayan_salt

> Some salts mined in Pakistan are not suitable for food or industrial use without purification due to impurities... Although a study of pink salts commercially available in Australia showed Himalayan salt to contain higher levels of a range of elements, including calcium, iron, magnesium, manganese, potassium, aluminum, barium, silicon, and sulfur, and reduced levels of sodium, compared to table salt, the authors concluded that "exceedingly high intake" (a level in excess of the recommended daily salt intake by almost 600%) would be required for the differences to be clinically significant, levels at which any potential nutritional benefit would be outweighed by the risks of elevated sodium consumption such an intake would entail.