Common indicators of nutritional adequacy include overall energy levels, skin health, and the presence of specific nutrients in the body. A well-balanced diet should result in consistent energy throughout the day, less fatigue, and better overall mood. Healthy skin, hair, and nails can indicate proper vitamin and mineral intake. Additionally, signs such as nails that are not brittle and skin without excessive dryness may show sufficient nutrient consumption. Regular health check-ups, including blood tests, can provide further insight into nutrient levels and deficiencies, helping individuals maintain optimal health.