糖尿病是由於體內胰島素的缺乏、分泌不足或標的細胞對胰島素有阻抗性，而導致無法正常調節血糖的生理功能，引起醣類，蛋白質、脂肪等營養素的代謝紊亂的一種慢性病。隨著長期血糖濃度的偏高，可導致眼精、血管、神經、腎藏、心臟的病變發生。此時需藉著飲食的調整，配合藥物和運動，以維持較正常的體重、血糖、血脂肪、血壓，進而延緩或減輕其併發病的發生。

　　　　　Diabetes mellitus is a syndrome of alteration in protein, carbohydrate and fat metabolism, caused by a relative or absolute lack of effective insulin action. The goals of dietary management for diabetes mellitus are the maintenance of a desirable weight, the prevention of hyperglycemia, hypoglycemia, and dyslipidemia, so as to delay or reduce the risk of complications of diabetes.