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or diabetes mellitus
, chronic disorder of glucose (sugar) metabolism caused by inadequate production or use of insulin, a hormone produced in specialized cells (beta cells in the islets of Langerhans) in the pancreas that allows the body to use and store
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increase in the sugar content of blood to over 120 milligram percent. Temporary hyperglycemia can occur in healthy individuals after intake of large quantities of sugar (so-called nutritional hyperglycemia), during intense pains, and during stress. Chronic hyperglycemia occurs in conjunction with diabetes mellitus, certain other endocrine diseases, deficiency of vitamins C and B1, febricity, hypoxia, and other conditions.