Iron(II) fumarate is widely used in the pharmaceutical industry as an iron supplement to treat or prevent iron deficiency anemia. It is commonly found in oral tablets, capsules, and liquid formulations, providing a bioavailable source of iron that helps restore healthy red blood cell levels. Additionally, it is used in fortified foods and dietary supplements to enhance iron intake, particularly for individuals with increased iron needs, such as pregnant women or those with chronic conditions. Its stability and relatively low cost make it a preferred choice in both medical and nutritional applications.