Breast cancer, in most cases, is responsive to oestrogen. This is why drugs such as Tamoxifen (an oestrogen antagonist) are used as treatment. However this is a simplified picture and does not recognise the role of other factors in stimulation of breast cancer proliferation.
Oestrogen metabolism, including processing through the liver and elimination via the bowel, are important determinants in the availability of oestrogen, whilst oestrogen binding can be affected by the diet. Inflammation, contributed to by diet or other sources, also plays a role, as does toxin exposure and elimination. Once again, the liver's detoxifiaction role and the body's antioxidant protection is central to the prevention of carcinogenesis