How Phytoestrogens Behave in Estrogen Positive Breast Cancer

What are Phytoestrogens

Phytoestrogens are estrogens that are derived from plants and have a structure similar to human estrogen. Phytoestrogens can bind to estrogen receptors (ERs) in the body. Because of this, there is interest in using them as cancer preventives and therapies, particularly for estrogen-positive breast cancer. There are three main types of phytoestrogens: isoflavones, lignans, and coumestans. Isoflavones are found in soybeans and soy products. Lignans are found in flaxseed and flax oil and some fruits, vegetables, and whole grains. Coumestans are found in alfalfa and clover.