Nutritional-related problems can severely impact the growth and development of children under five. It can trigger low IQ and delays in motor and skill development. Therefore, a good understanding of the factors related to children's nutrition will lead to the successful prevention of malnutrition in children under five. This research aims to analyze and synthesize data on factors related to the nutritional status of children under five. This study used a narrative review method. The literature in English was searched using the indexed databases of Google Scholar, Scopus, and PubMed. There were 9.129 scientific journals, and only 13 met the inclusion criteria. From the 13 journals, information was collected in the form of publication years from 2015 to 2021, journal titles, research designs, research populations, interventions, results, and most importantly, the nutrition issue in children under five. Data processing was done by collecting sentences that were relevant to the coding, reading and marking essential sentences, and compiling a framework for reviewing narratives. Data analysis was carried out qualitatively by presenting data and compiling research reports. The results reveal that variables such as prelacteal feeding history, mother's education, infectious diseases suffered, and antenatal care visits were the most critical factors affecting the nutritional status of children under five. Conclusion: The main factors causing the nutritional status of children under five are that the children have a history of prelacteal feeding, low maternal education, children under five often experience infectious diseases, and low antenatal care visits.