Magnesium: Magnesium is one of the minerals that our bodies most need due to its influence on just about every inch of our bodies. Magnesium deficiency tends to manifest in stress, anxiety, insomnia, and irregular heartbeat to name a few and hence the reason for maintaining good level. Aside from eating foods high in magnesium, supplementing with at least 320 mg per day is helpful depending on your stress level and diet.