Type 2 diabetes is more common than type 1 diabetes. Currently, nearly 30 million Americans have been diagnosed with 2 diabetes.
The main issue in type 2 diabetes is that your body can't use insulin effectively. Insulin is a hormone made in your pancreas that's necessary for processing glucose, which our bodies use for energy. Insulin allows the glucose to travel from the blood into the cells that need that it. If your body can't use insulin well, then it'll be more difficult for glucose to pass into the cells.
Not being able to use insulin well is called insulin resistance. Some people with type 2 diabetes are insulin resistant; other people with type 2 diabetes don't produce enough insulin to handle the glucose in their blood, so they also have insulin deficiency.
Regardless of whether you're insulin resistant or simply don't have insulin, the end result is the same in type 2 diabetes: glucose builds up in the blood, leading to hyperglycemia and possible long-term damage from hyperglycemia and poor blood glucose control.
Type 2 diabetes generally develops gradually. Over time, your body becomes less capable of using insulin, or it starts producing less insulin.
Type 2 diabetes is caused by a combination of factors, including genetics and lifestyle choices.
Genetics: There is a genetic component to type 2 diabetes, but that doesn't mean that just because your mother or grandfather has type 2 diabetes, you will develop it. It's better to think of it this way: if type 2 diabetes runs in your family, you're at a greater risk of developing it.
Lifestyle: Lifestyle choices play a sizable role in the development of type 2 diabetes. If type 2 diabetes runs in your family, you should work to take good care of your body and make healthy lifestyle choices so that you can reduce your risk of developing diabetes.
Lifestyle factors that play a role in developing type 2 diabetes are:
However, it is known that being overweight (having a body mass index of 25 or higher) increases your likelihood of type 2 diabetes. Extra fat makes you more likely to become insulin resistant, since it's known that fat interferes with how well insulin works.