Among the identified polymorphisms, the rs9939609 is one of the most strongly associated with common obesity [10,14,15]; however, several other single nucleotide polymorphism (SNP)s in the first intron of the FTO gene that are in linkage disequilibrium (LD) with rs9939609 showed similar effects on both childhood [4,7,16] and adult obesity [3,4]. The gene discussed is FTO; the disease is obesity due to melanocortin 4 receptor deficiency.