text_1:    An email claims that the use of antiperspirants is the leading cause of breast cancer.  The theory is that toxins are released by sweat, especially under the arms, and antiperspirants are blocking the release of the toxins, allowing them to build up, and the result is cancer.  It also claims that nearly all breast cancers are in the upper, outside quadrant of the breast, near the armpits. 
text_2: Breast cancer can be caused by underarm antiperspirants 