These 74+"plant-derived" minerals come from the 'Original' Thomas Jefferson Clark mine in Utah that started it all back in the 1920's. They have been carefully extracted in"purified water" using a method pioneered by Thomas Jefferson Clark which other companies would love to know about!
They have proven themselves worldwide since 1926 (Other "Copy-Cats" have only been around for about 19 years!) The minerals are produced in an "FDA registered & inspected" production facility using food grade equipment.
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