While, nonalcoholic fatty liver disease (NAFLD) occurring in human beings, metabolic disorder syndromes and obesity are also usually the main causes, with increased plasma insulin and fatty acid concentration, elevated fasting aminotransferase (AST/ALT) and/or triglycerides level, and also abnormal lipid accumulation in the liver [31, 32]. This evidence concerns the gene INS and obesity due to melanocortin 4 receptor deficiency.