Diabetes mellitus is a medical disorder characterized by persistent variable hyperglycemia (high blood sugar levels), resulting either from inadequate secretion of the hormone insulin, an inadequate response by the body's cells to insulin, or a combination of these factors.
The most common forms of diabetes are type 1, type 2 and gestational diabetes. Type 1 (10% of cases) is due to destruction of the islets of Langerhans, which produce insulin; it can only be treated with insulin injections. In type 2 (90% of cases) the main problem is decreased sensitivity of the body's cells to insulin, known as insulin resistance, although insulin production is often affected in the later stages; as well as diet and exercise, treatment usually is with tablets, or eventually with insulin injections. Gestational diabetes may develop during pregnancy and is similar to type 2 in its mechanism; it may affect fetal health and 40% of women with gestational diabetes develop type 2 diabetes later on in life.
Since the discovery of insulin (1921) diabetes has been a treatable but chronic condition, and the main risks to health are its characteristic long-term complications. These include cardiovascular disease (doubled risk), chronic renal failure (it is the main cause for dialysis in developed world adults), retinal damage which can lead to blindness and is the most significant cause of adult blindness in the non-elderly in the developed world, nerve damage, erectile dysfunction (impotence), to gangrene with risk of amputation of toes, feet, and even legs.
More on [ Diabetes mellitus ]
Diabetes Insipidus
Endocrinology
Gestational Diabetes
Diabetes :: Endocrine Disorders

Joslin Diabetes Center - Features news, patient services, professional education, research information, an online library, camps, and discussion groups.
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Abate Diabetes - Provides a fact sheet on diabetes addressing the causes, symptoms, preventions, and treatment available. Includes a self test.
Meta Description: [ General information on diabetes including facts on type 1 diabetes, type 2 diabetes, what causes diabetes, diabetes symptoms, and gestational diabetes. A discussion on cinnamon and diabetes and how added into the daily diet can reduce blood sugar levels. ]
BBC News: Study suggests 'type 3 diabetes' - Research showing that the brain produces insulin as well as the pancreas points to a third type of diabetes.
Meta Description: [ Research showing that the brain produces insulin as well as the pancreas points to a third type of diabetes. ]
Diabetes and Diabetics - Lists symptoms, causes, types, risk factors, management, complications, and discusses diet regimen.
Meta Description: [ Diabetes, including type 1 and type 2 diabetes, are unique conditions that require long-term life changes. Keep reading for more diabetes information on diabetic diets, diabetic complications, blood sugar levels, and types of insulin. ]
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Diabetes Handbook - Presents chapters about the types of diabetes, how to cope, monitoring, exercise, diet, medication, foot care, traveling, and sick day management.
Diabetes Home - Describes the disease and covers glucose, insulin, diet, exercise, pills, complications, and research. Written by a Canadian physician.
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Diabetes Watch - Covers the aspects of this disease, management, diet, nutrition, fitness, myths and facts. Includes a newsletter and forum. By Aventis.
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dLife - For Your Diabetes Life - Learn about the different types of diabetes, disease management, become a part of the community, and find articles from experts. Includes news and resources.
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eMedicine Health - Diabetes - Consumer health resource center providing an overview of diabetes and its causes, symptoms, and treatment.
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How Diabetes Works - Fully-illustrated tutorial looks at how your body handles glucose. Shows what insulin is, what it does, and how the lack of it affects your body. Includes current and future treatment. From How Stuff Works.
Meta Description: [ In the U.S. alone, 20.8 million people have diabetes -- and about a third don't even know it. Find out some information you just may need. ]
Lilly Diabetes - Learn more about managing your condition, taking insulin, and their products used to treat type 1 and type 2.
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MedicineNet: Diabetes Overview - Medical information about diabetes therapies, complications, research, and treatment. Provides a support group and news via RSS feed.
Meta Description: [ Medical information about Diabetes Mellitus, Type 2, Type 1, and Metabolic Disorders treatment and medications ]
National Diabetes Education Program - Covers diabetes control, prevention, resources for children, and awareness campaigns. From the National Institute of Health and Center for Disease Control and Prevention.
Meta Description: [ NDEP is a partnership of the National Institutes of Health and the Centers for Disease Control and Prevention that provides information on diabetes prevention and control. ]
National Diabetes Information Clearinghouse - Provides educational materials to increase knowledge and understanding about diabetes among patients, health care professionals, and the general public.
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The Hormone Foundation: Diabetes Information - Features an overview, symptoms, treatment options, lifestyle issues and prevention; as well as other diabetes-related resources.
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Yahoo Health: Diabetes Health Center - Find information on type 1 and type 2. Includes symptoms, diagnosis, complications, and treatments.
Harvard Medical Research: Diabetes - Diabetes: health and research information from Harvard medical faculty
Death to Diabetes (How to Reverse Diabetes) 1.1.-1.2 Lecture |