Magnesium Citrate - 825 mg - from it magnesium - 125mg - 33.3% of RDA. Magnesium citrate in anhydrous form - perfectly soluble in water. Vitamin B6 (pyridoxalo-5-phosphate) - 5 mg - 357% of RDA. Contains P-5-P or pyridoxal-5-phosphate active form of vitamin B6.