Flaxseed
"Lignans are another exemplary phytoestrogenic food group," says James. They're present in a wide variety of plant foods, including seeds (flax, flax seed oil, pumpkin, sunflower, poppy), whole grains (rye, oats, barley), and fruits (particularly berries). "Flaxseed is by far the richest dietary source of plant lignans," says James.
