Final answer:
Type 2 diabetes is the most common form of diabetes, affecting millions of Americans. Lifestyle factors play a significant role in the development of type 2 diabetes.
Step-by-step explanation:
Type 2 diabetes is the most common form of diabetes, accounting for about 90% of all cases in the United States. It is typically diagnosed in adults over the age of 40, but due to the increase in obesity, younger people are now also being diagnosed with type 2 diabetes. About 30 million Americans have type 2 diabetes, and another 90 million have pre-diabetes. Lifestyle factors such as poor diet and inactivity greatly increase the risk of developing type 2 diabetes.