Anaemia is mainly caused by lack of which nutrients?

• A. Lack of calcium
• B. Lack of iron or B12
• C. Lack of fluoride
• D. Lack of magnesium

Answer: (B)

Anemia happens when there aren’t enough healthy red blood cells or enough hemoglobin to carry oxygen around the body. The most common nutritional cause is iron deficiency, because iron is a key part of hemoglobin. Without enough iron, hemoglobin can’t be formed properly, so the blood’s oxygen-carrying capacity falls. Vitamin B12 is also essential for making healthy red blood cells; a deficiency impairs red blood cell production and can lead to anemia. So deficiencies in iron or B12 are the primary nutritional routes to anemia, making this the best answer. Calcium, fluoride, and magnesium don’t directly drive hemoglobin synthesis or red blood cell production, so their lack isn’t a typical cause of anemia.