While a higher magnesium intake is beneficial for most individuals those with low blood pressure usually require more calcium in addition. Normal blood pressure is about 120/80; the lower it is the higher should be the daily intake of calcium. While those with high blood pressure benefit from ingesting twice as much magnesium as calcium those with low blood pressure may take twice as much calcium as magnesium but both minerals in relatively high amounts. Those with low blood pressure and a tendency towards inflammations should also greatly reduce their intake of phosphorus. A high level of phosphorus in the blood tends to cause magnesium and calcium levels to be low.