Barlean's Brevail Plant Lignan Extract is the dietary supplement every woman has been waiting for! This natural formula supplies lignans, natural compounds that have been ingested in seeds, grains, beans, fruits and vegetables throughout human history. Research suggests that our bodies use natural plant lignans, now sparse in the modern diet, to safely and gently buffer and support excess estrogens. Brevail was researched and developed to increase lignan concentrations in the body to match levels found in women who demonstrate a history of breast health and hormonal balance.