- Type 2 Diabetes Warning Signs
- Dieting for Diabetes: Better Food Choices
- Take the Diabetes Quiz!
- Diabetes FAQs
- Patient Comments: Diabetes - Symptoms
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- Find a local Endocrinologist in your town
- Diabetes type 1 and type 2 definition and facts
- What is diabetes?
- How many people in the US have diabetes?
- 9 early signs and symptoms of diabetes
- How do I know if I have diabetes?
- What causes diabetes?
- What are the risk factors for diabetes?
- What are the different types of diabetes?
- What is type 1 diabetes
- What is type 2 diabetes
- What are the other types of diabetes?
- What kind of doctor treats diabetes?
- How is diabetes diagnosed?
- Why is blood sugar checked at home?
- What are the acute complications of diabetes?
- What are the chronic complications of diabetes?
- What can be done to slow the complications of diabetes?
- What is the prognosis for a person with diabetes?
Quick GuideType 2 Diabetes Diagnosis, Treatment, Medication
What is type 2 diabetes
Type 2 diabetes was also previously referred to as non-insulin dependent diabetes mellitus (NIDDM), or adult-onset diabetes mellitus (AODM). In type 2 diabetes, patients can still produce insulin, but do so relatively inadequately for their body's needs, particularly in the face of insulin resistance as discussed above. In many cases this actually means the pancreas produces larger than normal quantities of insulin. A major feature of type 2 diabetes is a lack of sensitivity to insulin by the cells of the body (particularly fat and muscle cells).
In addition to the problems with an increase in insulin resistance, the release of insulin by the pancreas may also be defective and suboptimal. In fact, there is a known steady decline in beta cell production of insulin in type 2 diabetes that contributes to worsening glucose control. (This is a major factor for many patients with type 2 diabetes who ultimately require insulin therapy.) Finally, the liver in these patients continues to produce glucose through a process called gluconeogenesis despite elevated glucose levels. The control of gluconeogenesis becomes compromised.
While it is said that type 2 diabetes occurs mostly in individuals over 30 years old and the incidence increases with age, an alarming number of patients with type 2 diabetes are barely in their teen years. Most of these cases are a direct result of poor eating habits, higher body weight, and lack of exercise.
While there is a strong genetic component to developing this form of diabetes, there are other risk factors - the most significant of which is obesity. There is a direct relationship between the degree of obesity and the risk of developing type 2 diabetes, and this holds true in children as well as adults. It is estimated that the chance to develop diabetes doubles for every 20% increase over desirable body weight.
Regarding age, data shows that for each decade after 40 years of age regardless of weight there is an increase in incidence of diabetes. The prevalence of diabetes in persons 65 years of age and older is around 26%. Type 2 diabetes is also more common in certain ethnic groups. Compared with a 7% prevalence in non-Hispanic Caucasians, the prevalence in Asian Americans is estimated to be 9%, in Hispanics 13%, in blacks around 13%, and in certain Native American communities 20% to 50%. Finally, diabetes occurs much more frequently in women with a prior history of diabetes that develops during pregnancy (gestational diabetes).