Be-Life Magnesium Quatro 900 is a highly absorbable magnesium supplement. Each capsule provides 225 mg of magnesium, essential for muscle, nerve and cardiovascular health. It helps relieve cramps, improve sleep and reduce stress. Composition Composition: Magnesium (citrate, bisglycinate, carbonate, oxide), capsule (gelatin, glycerin, water). Instructions for use Take 1 capsule daily with water. Pharmaceutical advice Benefits for muscle and nerve health.