Nutrient adequacy is achieving a balanced intake of essential nutrients, ensuring that all vitamins, minerals, proteins, carbohydrates, and fats are consumed in amounts that meet daily physiological needs. Inadequate nutrient intake, whether from dietary insufficiency or malabsorption, leads to various health problems like fatigue, weakened immunity, and developmental delays. Research in nutrient adequacy focuses on identifying the necessary intake levels to prevent deficiencies and optimize health outcomes for different populations. This research also examines fortified foods, bioavailability of nutrients from different sources, and tailored dietary guidelines to ensure comprehensive nutrient coverage. Achieving nutrient adequacy requires a varied diet that includes whole foods from all food groups. Nutritional policies increasingly promote balanced, nutrient-dense diets to help meet recommended daily allowances and support long-term health.