Magnesium contributes to normal functioning of the  nervous system, psychological function, muscle function and to the reduction of tiredness and fatigue. NaturesPlus® KalmAssure® Magnesium Nutrition Information  Serving Size 3 Capsules, Servings Per Container 30  Amount Per Serving %RI#  Magnesium (as citrate) . . . . . . . . . . . . . . . . 420 mg . . . . 112% Capsules deliver 420 mg of natural, essential magnesium in highly bioavailable citrate form. Ingredients:Capsule shell: hydroxypropyl methyl cellulose, magnesium citrate, anti-caking agents (magnesium stearate, silica) and bulking agent (microcrystalline cellulose).  Directions For Use:As a food supplement for adults, take 3 capsules daily, or as recommended by your health care professional. Do not exceed recommended serving. This product is not a substitute for a varied and balanced diet and a healthy lifestyle, which are important for health.  Warnings:Keep out of reach of children.