Why do the total amounts of magnesium and equivalent elemental numbers on the label not add up?Updated 4 months ago

We understand this may be confusing. We are required to label like this for regulation purposes.

Minerals, such as magnesium, are bound to some other element or compound. The term ‘equivalent elemental’ refers to how much of the actual mineral, in this case magnesium, is present. For example, magnesium citrate is a combination of both magnesium AND citrate. So if the amount contains 320mg of total magnesium citrate (the magnesium and citrate bound together) and an equivalent elemental magnesium dose of 50mg, the 50mg is the magnesium specifically that is present and being absorbed by the body. 

So the total elemental magnesium is the total of the magnesium that is present and that the body is absorbing from each of the three forms magnesium citrate, magnesium amino acid chelate and magnesium glycinate dihydrate.