A macronutrient is a nutrient that provides energy in large amounts, typically including carbohydrates, proteins, and fats. These are required in significant quantities for energy, growth, and bodily functions. In contrast, a micronutrient refers to vitamins and minerals necessary for various biochemical functions but needed in smaller amounts. While both types of nutrients are essential for health, macronutrients provide the caloric fuel our bodies require, whereas micronutrients support various physiological processes including immune function and bones health. Understanding the difference is vital for a balanced diet.