Mineral Forms on Supplement Labels

A mineral supplement label often lists the nutrient amount followed by the compound used as its source. Magnesium citrate, magnesium oxide, zinc chelate, and potassium iodide are examples. The Supplement Facts nutrient amount usually represents the elemental mineral, not the full weight of the source compound. Compare the nutrient amount first. Then use the source form as extra context. MPG 125 Drive information lists several mineral source forms and gives a clear example of this label structure.