This is a study designed to investigate the effect of liraglutide in type 2 diabetes therefore subjects are selected from type 2 diabetes population of the Los Angeles basin area. The study population is represented by type 2 diabetics (age 18-65 y old, T2DM diagnosed by current American Diabetes Association diagnostic criteria ( HbA1c ≥ 6.5 % or fasting plasma glucose ≥ 126 mg/dl or 2h plasma glucose ≥ 200 mg/dL during an OGTT or in a patient with classic symptoms of hyperglycemia or hyperglycemic crisis a random plasma glucose ≥ 200 mg/dl).