This study is conducted to examine GLP-1, insulin resistance and insulin sensitivity portfolio in Malay, Chinese and Indian populations in Malaysia and to study the effect of DPPIV inhibitor in T2DM patients with different GLP-levels.

Inclusion Criteria:

• Subjects are newly diagnosed of T2DM according to World Health Organisation criteria) and do not receive any glucose-lowering drugs
• Subjects with normal glucose tolerance test according to World Health Organisation criteria which is carried out immediately before inclusion in the study
• Subjects who are willing to participate and sign the informed consent form

Exclusion Criteria:

• Patients with pre-existing T2DM
• Patients with family history of diabetes
• Patients receiving glucose-lowering medications
• Patients with anemia, abnormal serum creatinine level, macroalbuminuria, proliferative retinopathy, impaired liver function