Micronutrients differ from macronutrients in their required quantities and functions within the body. Macronutrients, such as carbohydrates, proteins, and fats, are needed in larger amounts and provide energy and structural support. In contrast, micronutrients, including vitamins and minerals, are needed in much smaller amounts but are essential for various biochemical processes, such as metabolism, immune function, and overall health. Both are necessary for optimal health.