Patients often report that their physical condition has been very good before, and they have recently experienced fatigue, dizziness, headaches, and increased heart rate. They were diagnosed with iron deficiency anemia when they went to the hospital for a checkup. However, they usually eat well and live regularly. I don't know why I have anemia.
So, what are the causes of iron deficiency anemia?
The main causes of iron deficiency include: 1. Reduced intake; 2. Excessive loss; 3. Increased demand.
1. Reduced intake: The main source of human iron is food. The iron in food mainly comes from animal food (such as blood products, meat, poultry, animal offal, etc.), and plant and mushroom food (such as fungus, Mushrooms, vegetables, beans, etc.). Most of the iron needed by the human body needs to be absorbed from the duodenum and upper jejunum.
Therefore, whether it is due to the lack of iron in the food itself or the reduction of iron absorption due to various reasons, it will cause the reduction of iron intake.
Lack of animal food, vegan food may lead to lack of iron in food. As for the factors that lead to reduced iron absorption, on the one hand, certain foods (such as tea) or drugs (such as calcium carbonate, magnesium sulfate, etc.) can affect iron absorption. On the other hand, gastrointestinal diseases (such as gastric Helicobacter pylori infection, celiac disease, atrophic gastritis, inflammatory bowel disease) and gastrointestinal surgery (such as subtotal gastric resection, bariatric surgery, etc.) will also reduce iron content. Absorption from the gastrointestinal tract.
2. Excessive loss: Normal human body will not lose excessive iron. However, due to gastrointestinal diseases (such as esophagitis, gastritis, peptic ulcers, tumors, hemorrhoids, parasites, etc.), genitourinary system diseases (such as menorrhagia, uterine fibroids, tumors, etc.), systemic diseases and other Special reasons (such as trauma, etc.) can cause the body to lose too much iron, leading to iron deficiency and even iron deficiency anemia.
3. Increased demand: there is no problem of insufficient iron intake or excessive loss mentioned above, but iron deficiency caused by the body's increased demand for iron under special physiological conditions (such as child development, pregnancy, etc.) is also called "Physiological iron deficiency".