The use of vegetarian/vegan diets have increased exponentially in the last years. These diets might have a role in the nutritional management of patients with diabetes mellitus type 2 (DMT2). Objective: Describe the current state of scientific literature until October 31st of 2020, regarding the effects of vegetarian/vegan diets in the control of the glycemic profile in patients with DMT2. Materials and methods: A scoping review included Pubmed and Scopus and searched for empiric and theoretical publications in English and Spanish after January 1st of 2015. Results: 54 documents and 5 clinical trials supported an association between the implementation of vegetarian/vegan diet and a reduction in glycosylated hemoglobin values and a better glycemic control. Additional findings included an improvement in the lipid profile, lower weight and BMI, and a reduction in the development and progression of cardiovascular disease.