A high consumption of omega - 6 polyunsaturated fatty acids may increase the likelihood that postmenopausal women will develop breast cancer .
Omega - 6 polyunsaturated fatty acids are found in most types of vegetable oil including soybean oil .
A high consumption of omega - 6 polyunsaturated fatty acids , which are found in most types of vegetable oil including soybean oil , may increase the likelihood that postmenopausal women will develop breast cancer .