Parenteral support has increased the possibility of neonatal recovery. However, complications associated with its use have been documented. One commercial method developed to decrease the complications of this type of support is the ready-to-use parenteral nutrition (PN), a 3-chamber bag that provides a complete nutrient mix. This systematic review seeks, through the Preferred Reporting Items for Systematic Reviews and Meta-Analyses methodology, to establish the benefits in newborns. Seven databases and gray literature were used. The search was limited to publications from 2007–2017 and to articles written in English, Spanish, and Portuguese. Articles that did not meet the inclusion criteria and studies with low quality evaluated with the Scottish Intercollegiate Guidelines Network guidelines, which were without information about the study or analytical methods, were excluded. A total of 24,193 articles were obtained, which were initially evaluated by title and abstract according to the inclusion criteria. A total of 24,167 articles were discarded, obtaining 27 eligible for follow-up evaluation. After a detailed evaluation of the full text, 13 articles were selected. It was found that ready-to-use PN has the potential benefit to reduce the risks for infections, provide an adequate supply of nutrients, generate growth within the expected range, provide ease of use, decrease prescription errors, and potentially reduce costs. It is necessary to evaluate the short- and long-term impact of its use.