Related topics: estrogen; soy; soy isoflavones; phytoestrogens
What are lignans
Lignans are substances of natural origin that help us maintain a healthy heart and strengthen the immune system. Contained in the woody tissues of plants, in cereals, especially in rye, and in some vegetables (carrots, broccoli, cabbage, strawberries and berries), are phenolic compounds formed by the union of phenylpropane molecules.
Through lignans, plants defend themselves from the aggression of microorganisms; however, the human body can also benefit from their antibacterial, antifungal and antifeedant properties.
Properties and Uses
In addition to herbal medicine, lignans represent substances of enormous interest also in the pharmacological field, thanks to their anticancer properties.
Together with isoflavones and cumestanes, lignans belong to the class of phytoestrogens, substances that seem to contribute to the lowering of the risk of breast cancer, cardiovascular diseases and also prostate and colorectal cancer.
Lignans are therefore recognized as having the ability to prevent and combat some forms of cancer and in particular cancer of the prostate, colon and skin. They also exert a protective action against hepatotoxic agents, cardiovascular diseases and the immune system.
We conclude this chapter by remembering that when it comes to cancer there are no magic potions or "special foods" and that prevention is implemented, not only by following a diet rich in lignans, isoflavones and antioxidants, but also by adopting a more careful and respectful of our most precious asset: health.
Lignans in food
Unlike isoflavones (famous are those of soy), lignans are not associated with the protein fraction but with the non-starchy polysaccharide fraction of the plant. These substances are present in high quantities in sesame seeds and in flax seeds; they reach higher concentrations in whole grains than in refined ones.
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