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    Anemia

    a·ne·mi·a — ah-NEE-mee-ah

    Definition

    Anemia is a condition in which your blood doesn't have enough healthy red blood cells or hemoglobin to carry adequate oxygen to your body's tissues. Hemoglobin is the iron-rich protein inside red blood cells that binds to oxygen in the lungs and delivers it throughout the body. When you're anemic, your organs and tissues don't receive the oxygen they need to function efficiently, which can leave you feeling tired, weak, and short of breath.

    There are many types of anemia, each with different causes. Iron-deficiency anemia — the most common form worldwide — occurs when your body doesn't have enough iron to produce adequate hemoglobin. Other types include vitamin-deficiency anemias (caused by low B12 or folate), anemia of chronic disease (associated with conditions like kidney disease or cancer), aplastic anemia (where the bone marrow fails to produce enough blood cells), and hemolytic anemias (where red blood cells are destroyed faster than they're produced).

    Anemia affects approximately 1.6 billion people globally and is especially common in women of reproductive age, pregnant women, young children, and the elderly. While mild anemia may cause few noticeable symptoms, moderate to severe anemia can significantly impact quality of life and, if left untreated, can lead to serious complications including heart problems.

    Also Known As

    Low blood countIron-poor blood

    Key Facts

    • •Iron-deficiency anemia is the most common type worldwide, affecting an estimated 30% of the global population.
    • •Women are more susceptible due to menstrual blood loss and increased iron demands during pregnancy.
    • •Common symptoms include fatigue, pale skin, shortness of breath, dizziness, cold hands and feet, and brittle nails.
    • •A complete blood count (CBC) is the primary diagnostic test, measuring hemoglobin, hematocrit, and red blood cell indices.
    • •Treatment depends on the type and cause — ranging from iron supplements to B12 injections to blood transfusions in severe cases.

    How It Relates To Your Health

    Anemia is relevant to a wide range of clinical situations. Iron-deficiency anemia may indicate underlying conditions such as gastrointestinal bleeding, celiac disease, or heavy menstrual periods. Anemia of chronic disease often accompanies inflammatory conditions, kidney disease, or cancer. If you've been told your blood counts are low, identifying the specific type of anemia is crucial for effective treatment.

    Regular monitoring through complete blood counts is important for people at higher risk, including those with chronic diseases, pregnant women, vegetarians and vegans (who may be low in B12 and iron), and individuals with a family history of inherited anemias like sickle cell disease or thalassemia.

    Sources

    1. Anemia — National Heart, Lung, and Blood Institute (NIH)
    2. Anemia - Symptoms and Causes — Mayo Clinic
    3. Iron-Deficiency Anemia — World Health Organization

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