Micronutrient deficiency occurs when the body lacks essential vitamins and minerals needed for good health. These nutrients, such as iron, vitamin A, and zinc, play crucial roles in various bodily functions, including immune support and energy production. Without enough of these micronutrients, individuals may experience fatigue, weakened immunity, and other health issues. This deficiency is often seen in populations with limited access to diverse foods, particularly in developing countries. It can lead to serious health problems, such as anemia from low iron levels or vision issues from a lack of vitamin A. Addressing these deficiencies is vital for overall well-being.