Objective: The aim of this study is to evaluate how the frequent sugar and protein intake is associated with the severity of plaque-induced gingivitis in children. Materials and Methods: A cross-sectional study was conducted, involving 38 subjects (4-14 years) at a mean age of 8.5 ± 2.32 years with diagnosed plaque-induced gingivitis based on the Löe-Silness Gingival Index (GI) (0 < GI ≤ 3). The gingival status was assessed by the Silness-Lőe Plaque Index (PLI), GI, and Papillary Bleeding Index by Saxer and Muhlemann. The nutritional status was established through an in-depth questionnaire on protein and sugar intake. Results: The increased frequency of sugar consumption in children with plaque-induced gingivitis is related to enhanced gingival inflammation. Higher values of PLI among the rep- resentatives were established with frequent sugar intake (P = .04). Frequent dairy protein con- sumption was associated with lower levels of PLI (P = .04). This index is indicative of the amount of accumulated dental plaque, which is the main etiological factor involved in plaque-induced gingivitis. Conclusion: It can be concluded that uncontrolled sugar consumption in children was asso- ciated with enhancement of the severity of plaque-induced gingivitis. Frequent dairy protein intake has the potential to serve as an essential prevention strategy regarding the onset and aggravation of plaque-induced gingival inflammation in childhood. A well-balanced diet, rich in proteins and with restricted sugar intake, is considered a possible tool in the prevention and control of plaque-induced gingivitis in childhood.