Glucagon-like peptide-1 (GLP-1) overpowers glucagon secretion, endorses satiety, postpones gastric draining, and arouses peripheral glucose consumption. This systematic review was carried out including PubMed, Google Scholar, and EBSCO that examined randomized controlled trials, observational, and experimental studies that had studied the role of GLP-1 (liraglutide) in controlling juvenile diabetes. The study included 7 studies and concluded that the introduction of liraglutide to insulin treatment juvenile diabetic patients results in a considerable and fast decrease in glycemic excursions and a consequent reduction in insulin dose. Body weight decreases substantially as reported in many studies.