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Mineral

Magnesium Sulfate

Magnesium sulfate is the magnesium salt known as Epsom salt. As a medicine it is labeled as a saline laxative for occasional constipation.

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The product’s intended use comes first

The cited Epsom-salt label is for an oral medicinal product with explicit directions. Evidence about mineral water, an oral laxative and skin application should be kept separate; the product name alone does not make these routes interchangeable. 1 2 3

Salt weight is not elemental magnesium

The medicinal label expresses the dose in grams of magnesium sulfate heptahydrate. Nutritional limits refer to magnesium itself. These numbers describe different quantities and should not be compared as though a gram of salt were a gram of magnesium. 1 4

Sources