人为什么会贫血？

Core Insights - Anemia is a widespread blood disorder affecting approximately 1.8 billion people globally, with significant prevalence among women aged 15-49 (30%), pregnant women (37%), and children aged 6-59 months (40%) [1] - The primary regions with the highest rates of anemia are sub-Saharan Africa and Asia [1] Group 1: Causes of Anemia - Insufficient production of red blood cells due to nutritional deficiencies, particularly iron, vitamin B12, and folic acid, which are essential for red blood cell formation [5] - Destruction of red blood cells occurs too rapidly, often due to autoimmune diseases or certain dietary triggers like fava beans, which can lead to hemolytic anemia [5] - Loss of red blood cells through bleeding, which can happen during menstruation, gastrointestinal issues, or traumatic injuries, leading to acute oxygen deprivation in the body [5] Group 2: Symptoms and Prevention - Initial symptoms of anemia include fatigue, shortness of breath, and pallor, with more severe symptoms like dizziness and increased heart rate if left untreated [6] - Preventive measures include a diet rich in iron from sources like lean meats, eggs, and spinach, combined with vitamin C-rich foods to enhance iron absorption [6] - Special populations such as the elderly and pregnant women may require iron supplements or vitamin B12 under medical guidance, along with timely treatment for conditions that cause chronic blood loss [6]