Question: what is the difference between magnesium oxide and magnesium gluconate?
Answer: Why Magnesium Oxide Provides More Elemental Magnesium It's therefore not absorbed as rapidly as other forms of magnesium, e.g. magnesium citrate, gluconate, lactate, aspartate. But although magnesium oxide has a lower rate of absorption it contains a MUCH greater amount of actual magnesium to begin with.