FFAR4 and obesity due to melanocortin 4 receptor deficiency: A lot of studies focused on GPR120, also named Free Fatty Acid Receptor 4 (FFAR4; UniProt ID Q5NUL3), being an interesting drug target for the management and treatment of a series of disorders including Type 2 diabetes mellitus, obesity and those related to the sense of satiety (Burns and Moniri, 2010).