High doses of magnesium: 664mg marine magnesium oxide, of which 400 mg of elemental magnesium per capsule. 365 capsules for a one year. Magnesium extracted from the Dead Sea in Israel High Bioavailability -. Studies show that the utility and bioequivalence of magnesium oxide and magnesium citrate are equal. The scientific study of Shechter et to the. (2012) shows that after several weeks storage are significantly better intracellular magnesium magnesium oxide compared to magnesium citrate 100% VEGANO. This product is suitable for vegetarians and vegans.