Type 1 and Type 2 Diabetes
Diabetes is a disease in which the level of glucose in the blood is too high, Glucose-a
sugar needed by all cells of the body for energy-is normally transported to the cells with
the help of the hormone insulin, which is produced by the pancreas. In type 1 diabetes,
which is partly genetically inherited, the pancreas cannot make enough insulin because
its insulin-producing cells have been destroyed by the body's own immune system. Thus,
glucose accumulates in the blood. In contrast, people with type 2 diabetes can produce
insulin, but their bodies are unable to utilize it effectively. Type 2 diabetes may be caused
by lifestyle factors, such as high consumption of sugar, in addition to genetics. Type 1
diabetes has a lower prevalence than type 2, accounting for just five to ten percent of
diabetes cases. The two conditions also differ by age of onset. Type 1 diabetes typically
develops during childhood, while type 2 most commonly occurs in mid- to late adulthood.
What is the main idea of the passage?

The main idea is identified by reading the text, at the moment in which the reader perceives what is the main subject that is being presented, debated, and argued. In the case of the text above, we can see that this subject is the types of diabetes.

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