Flax and sesame seeds offer anti-cancer lignans which can significantly reduce tumor growth by increasing cell death and decreasing angiogenesis (the growth of new blood vessels that allow cancer to advance). Lignans are phytoestrogens that can relieve the symptoms of menopause and modulate the effects of estrogen in the body by connecting to their receptors (just as tamoxifen does, thus inhibiting cancer cell replication) as they have a very similar chemical structure as to an estrogen molecule. Studies have found that consuming 25-30 grams of flaxseed daily inhibits the growth of ER+ and ER- breast cancers and reduces the metastasis of breast tumors.