Final answer:
Type 2 diabetes is the most common form of diabetes, occurring in both adults and now increasingly in teens and young adults due to high obesity rates. It is characterized by a lack of sensitivity to insulin in body cells, resulting in high blood glucose levels. Many people may be unaware of their condition.
Step-by-step explanation:
Type 2 diabetes is the most common form of diabetes, accounting for about 90% of all cases. It occurs when the body cells are no longer sensitive to insulin, leading to high blood glucose levels. While it typically develops in adulthood, the rise of obesity in younger people has resulted in more cases being diagnosed among teens and young adults. Type 2 diabetes is often asymptomatic and many people are unaware that they have it.