SHAKLEE Sustained Release VitalMag 30sSupports nerve and muscle functionSupports cardiovascular healthSupports healthy blood-sugar levelsVitalMag’s proprietary blend includes elemental magnesium from three different sources. Our blend has added potassium for proper nerve transmission and normal muscle contraction? plus boron to aid in bone metabolism and magnesium utilization.*Sustained delivery system for easy digestion.Amount per serving %DVMagnesium(as magnesium oxide? magnesium citrate? and magnesium gluconate) 200mg 50%Potassium (as potassium chloride) 99mg 3%Boron (as trace mineral protein hydrolysate) 0.7mg +**Percent Daily Values are based on a 2?000 calorie diet. Your diet values may be higher or lower depending on your calorie needs.†Daily Value Not Established.How to take:Take 1 tablet daily or as needed