The most common nutrient deficiency disease is

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Iron-deficiency anemia is the most common nutrient deficiency disease worldwide, affecting more than one billion people. It occurs when there is not enough iron in the body to produce hemoglobin, which is necessary for transporting oxygen in the blood. Scurvy, goiter, and beriberi are also nutrient deficiency diseases but are less common than iron-deficiency anemia. Scurvy is caused by a lack of vitamin C, goiter by a lack of iodine, and beriberi by a lack of thiamine.

The Most Common Nutrient Deficiency Disease Is