Introduction: Some studies have done on the effects of olive oil consumption on metabolic factors related to diabetes, but findings in this regard are conflicting. Hence, current study aimed to review findings of clinical trials about the effects of olive oil consumption on the symptoms and metabolic factors of diabetes.

Materials and Methods: Evaluated studies were extracted from databases of PubMed, Google Scholar, SID, Irandoc, MEDLINE and EMBACE between 2000 and 2017 using olive oil, diabetes, lipid profile and clinical trials as keywords. Totally, eleven studies were assessed in the current review. 

Results: Based on findings of current review study, olive oil consumption improved glycemic responses and lipid profile and also regulate blood glucose in patients with diabetes mellitus. In addition, olive oil consumption could induce a reduction in weight, body mass index and liver fat, and an increase in Glucagon like peptide-1 (GLP-1) in diabetic patients. Furthermore, few studies showed that olive oil administration improves foot ulcer in diabetic patients.

Conclusion: Findings of current review showed that olive oil consumption can improve blood glucose, lipid profile and anthropometric measurements in diabetic patients. Further studies are required to confirm these findings.