Type 2 diabetes is the most common type of diabetes, accounting for about 90% of all diabetes worldwide. In type 2 diabetes, hyperglycemia is the result of the initially inability of the body's cells to respond fully to insulin, which is called insulin resistance. With insulin resistance, the hormone is ineffective, and this, according to the feedback principle, contributes to an increase in insulin production. Over time, inadequate insulin production can develop as a result of pancreatic β cells failing to meet demand. Type 2 diabetes is most commonly seen in adults, but is increasingly seen in children and young adults due to weight gain, physical inactivity, and poor diet.