Siloxanes – Do You Want to Take the Risk? In Cancers, Denise's Blog, Endometriosis, Fibroids, PCOS, Pregnancy, Toxic Lifestyle Siloxane is a known Endocrine disruptor, which can interfere with hormonal balance. If you have fibroids, breast cancer, PCOS, infertility and endometriosis, prostate cancer, stay clear. Read More Share: