GHRL and morbid obesity: expression level tended to be slightly, but non-significantly, decreased in the peripheral blood immune cells of patients with morbid obesity compared the CTRL but showed significantly increased levels 1 – 2 months p.s., reaching CTRL levels 9 – 11 months p.s. Ghrelin levels were already slightly, non-significantly decreased at baseline compared to the CTRL and further decreased after surgery not showing any sign of rising to CTRL levels within the observed period.