??Sundown Naturals Iron plays a key role in energy metabolism, and helps deliver oxygen to the cells, including your muscle cells.* Iron also supports normal red blood cell production.* These vegetarian-friendly Iron tablets are provided as Ferrous Sulfate, which contains the iron your body needs for daily functioning.* Pregnancy, menstruation and growth increase Iron requirements - making these tablets a great way for women to get a high-potency source of this essential mineral in a convenient, one-tablet dose.