British scientist from Oxford University published that genes have limited meaning in growth of breast cancer,and they are independent of individual way of living. This facts include weight,nutrition,consumation of alcohol and breast feeding and it is science proved that theese facts have greater impact on cancer than genes. Researches after collected results from 18 000 women conclude that healthy living has great importance regardless genetic predispositions to develop breast cancer. Breast cancer is the most common form of cancer in hi-developed countries and takes half million lifes by vear. It is estimated that so far 18 identificated often genetic variants is releated 8 percent of cases of this disease. Taking results from one study 40 percent of breast cancer is possible to stop by keeping healthy living,keeping healthy weight,stop consumation alcohol,fitness and breast feeding.