The Effect of GLP-1 Analogues on Liver Steatosis and Fibrosis in Diabetic and Obese Patients in a Clinical Setting

Inclusion Criteria: * The patient is older than 18 years old. * The patient has obesity, defined as a BMI of 30 or higher; and/or the patient suffers from T2DM, defined as a twice measured sfG of 125 mg/dl or higher, or a sfG of 100 to 125 mg/dl and a twice measured oral glucose tolerance test (OGTT) with a serum glucose (sG) of 200 mg/dl, or higher after 2 hours, or a random sG of 200 mg/dl or higher in symptomatic patients. * The patient suffers from NAFLD in any stage, except cirrhosis. This has to be objec-tively diagnosed by either a CAP fibroscan (cutoff: \> 238 dB/m); or by the calculated NAFLD liver fat score (cutoff: \> -0,64), at least one of which has to be positive. * The patient is starting a GLP-1 analogue as treatment for T2DM or obesity as would be prescribed outside of this study; or the patient has started a GLP-1 analogue as treatment for T2DM or obesity as would be prescribed outside of this study 12 months prior. * If the patient is part of the retro-prospective branch data collected 12 months prior include at least a (CAP) fibroscan, a blood sample (measuring AST, ALT, GGT, sfG, sfI, HbA1c, HDL, LDL, total cholesterol and platelets) and a physical examination (measuring blood pressure, waist circumference, weight and length). Exclusion Criteria: * The patient suffers from alcohol induced fatty liver disease. Macrocytic anemia; de-creased vitamin B12 and folic acid; increased GGT, bilirubin, ferritin, TG and AST/ALT ratio can be used as serum markers of alcohol abuse. Interpretation of these results will be the left to the patient's clinician and their clinical expertise. Alterna-tively a weekly alcohol consumption of 21 units for men and 14 units for women can be used as a cutoff. * The patient suffers from drug induced liver steatosis. Drugs warranting exclusion include glucocorticoids, amiodarone, tamoxifen, methotrexate, valproate, tetracycline and chemotherapeutic agents. * The patient suffers from any other chronic liver disease. These will be checked trough lab test results in the patients file. * The patient has liver cirrhosis, defined as a fibroscan score of 14 kPa or more; or a FIB-4 index of \> 2,67. Elastography * The patient is pregnant at time of enrolment or at any time during the study. * The patient refuses to agree to the informed consent.