Phytoestrogens and prevention of breast cancer: The contentious debate

Table 1 Major classes of phytoestrogens and their common dietary sources

Flavanoids	Isoflavonoids	Lignans	Coumestans	Stilbenes
Apigenin	Genistein	Enterodiol	Coumesterol	Resveratrol
Quercetin	Biochanin A	Enterolactone
Narigenin	Diadzein → equol
Catechins
Red/yellow fruits and vegetables, tea	Soy beans, soy foods, vegetables	Flaxseed, whole grains, fruit, vegetables	Peas, beans, alfafa, sunflower seeds	Red wine