Iron - the element of life. Iron is a fundamental building block of red blood pigment and an important factor for the function of hormones, neurotransmitters, and enzymes. This makes it vital for the oxygen supply to the brain, muscles, and organs, as well as for the regeneration of bones, cartilage, and connective tissue. It also plays a crucial role in detoxification and immune defense. Iron deficiency is widespread, especially during growth phases, among women, pregnant individuals, vegetarians, older adults, athletes, or those taking medications. Don’t take chances! The patient guide informs you about the roles and functions of iron, symptoms of deficiency, risk groups, and ways to ensure adequate intake through proper nutrition and iron supplements. It also includes a simple iron check to help you determine if you belong to a risk group or are under-supplied.