Doppelherz Magnesium + Vitamin B is a dietary supplement intended for adults and children over 12 years of age. It contains magnesium, which is used for normal energy metabolism and contributes to the normal functioning of the nervous system and muscles. Vitamins B6 and B12 contribute to the formation of red blood cells and support the transport of oxygen in the blood. Folic acid plays a role in normal cell division and the formation of blood cells. Vitamin B1 plays a role in the proper functioning of the heart.