Bra wearing habits: In a study by Singer and Grismaijer in 1995, three out of four women studied who wore a bra for 24 hours a day developed breast cancer compared to one out of 168 who wore a bra rarely or never. That is a huge difference, and the implication is clear. Your first line of defense in preventing breast cancer is to severely limit how many hours a day you wear a bra. Bras do not cause the cancer initially but they restrict the flow of lymph within breast tissue, thereby hindering the normal cleansing process of the breast tissue. Many environmental toxins and pesticides that cause and promote cancer are "fat-loving" and so they tend to reside in the breast tissue. Lymph fluid carries away waste products, dead cells, and toxins. Copyright© 007 Breasts Want to read more? Subscribe to one of our monthly plans to continue reading this article.