Soybeans, flax, broccoli, cauliflower and whole grains are sources of natural estrogen, according to the Breast Cancer Fund. Clinical studies and anecdotal evidence suggest that natural forms of estrogen ease some symptoms of menopause and support bone health and low-density lipoprotein levels.
Soybeans contain isoflavones, which are phytoestrogens, or compounds with estrogenic properties derived from plants. Supplementing with soy potentially encourages bone formation and alleviates hot flashes. As of 2015, current human research suggests that soy, specifically its phytoestrogens, protects against breast cancer and slows the progress of different cancers, reports WebMD.
Lignans are the phytoestrogens present in flax. In addition to the health benefits commonly associated with phytoestrogens, lignans also possess anti-inflammatory properties, explains WebMD.