Occurrences of inheritable forms of obesity ar proof that fatness is also caused by genetic mutations, however, as yet, solely seventy eight cases worldwide are attributed to mutations of seven distinct genes. The most common forms of obesity are probably the result of variations within a large number of genes. Sequence variations within a pool of 56 different genes have been reported as being related to obesity phenotypes, however, only ten of those genes showed positive results in at least five different studies. Beside these rare cases, several people have a genetic predisposition that will cause obesity. Researchers have found several obesity susceptibility genes and therefore the combination of associate obesogenic surroundings and a genetic predisposition can nearly ineluctably end in the event of obesity.