hey kay,
which form of magnesium will suit a person best depend on his individual requirement and ailment , normally magnesium citrate and magneium L lactate dehydrate mostly used in supplements, bcoz their bioavailability is gud. besides this, magnesium is used in different forms baed on its end line use, for eg,
Magnesium sulfate - used as a laxative, and as a highly soluble fertilizer.
Magnesium hydroxide- used in antacids and laxatives.
Magnesium chloride, oxide, gluconate, malate, orotate and citrate-used as oral magnesium supplements.
Magnesium borate, magnesium salicylate, and magnesium sulfate - used as antiseptics.
Magnesium bromide is used as a mild sedative (this action is due to the bromide, not the magnesium).