White and red blood cell count, thrombocyte, sodium, glucose, insulin, HbA1c, uric acid, triglyceride, LDL-cholesterol, ASAT/GOT, ALAT/GPT, GGT, alkaline phosphatase, ferritin and CRP values were significantly higher in patients with obesity compared to controls with a normal BMI. Here, GPT is linked to obesity due to melanocortin 4 receptor deficiency.