Journal of Applied Toxicology published a study on January 12, 2012 finding 99 percent of breast tissue samples from post-mastectomy contained parabens. Tissue was collected in England from 40 patients with primary breast cancer between 2005 and 2008.
Parabens Seen in Almost All Breast Mastectomy Samples. MDNews.com. January 12, 2012.
Measurement of paraben concentrations in human breast tissue at serial locations across the breast from axilla to sternum. Journal of AppliedToxicology. L. Barr, G. Metaxas, C.A.J. Harbach, L.A. Savoy, P.D. Darbre. Wiley Online Library. January 12 2012.