Various mechanisms can contribute to the loss or change of gustatory function, such as: age, ethnicity, drug use for treating another disease, alcohol consumption, smoking, infection, poor oral hygiene, nutrients consumption deficiencies, and diseases as Alzheimer's, Parkinson's, hypothyroidism, and diabetes mellitus [1,3,7].According to the International Diabetes Federation (IDF) [8], diabetes is a chronic disease that occurs when the body cannot produce enough insulin and/or cannot use it effectively. Secretory or