Recently, increasing interest in health care is boosting demand for products such as immuno-enhanced products and vitamins. There is a large selection of health functional foods for use by diabetics. Diabetic patients may learn about health functional foods from people around them, internet, and TV. Therefore, diabetic educators need to impart a good understanding of health functional foods so patients do not use them indiscriminately. It is important for diabetic educators to specifically ask patients about the use of healthy functional foods in their consultations. In addition, diabetic educators should provide knowledge on the efficacy of health functional foods and the desirable information.