There's more to a healthy diet than merely getting the desirable calories. At the present cross-sectional study, dietary consumption was measured using 24-hour dietary recall method. Nutrient density was evaluated using the NRF 9.3 index, which is based on nine recommended nutrients and three nutrients to limit. The link between carbohydrate, protein, fat, fiber and sugar intake at breakfast and the nutrient density in subsequent meals was evaluated using dose-response analysis. A total of 427 adults (199 men and 228 women) were included. The study found an inverse relationship between sugar intake at breakfast and nutrient density at lunch. Specifically, consuming up to 10 g of sugar at breakfast was associated with a reduction in the NRF profile, Additionally, breakfasts containing 12 g of fat were linked to the lowest nutrient density (p