What is the most common micronutrient deficiences worldwide?

The most common micronutrient deficiencies worldwide include iron, vitamin A, and iodine. Iron deficiency often leads to anemia, affecting millions, particularly in developing countries. Vitamin A deficiency can cause severe visual impairment and increase susceptibility to infections, while iodine deficiency is the leading cause of preventable intellectual disabilities and goiter. Addressing these deficiencies is crucial for improving overall health and development, especially in vulnerable populations.