Flax seeds are reach in fatty acids omega 3, that help to control the level of cholesterol in blood, and in lignans, a type of phytoestrogens supposed to have, according to scientific studies, anti-cancer properties. In addition to this, flax seeds are also a good choice in case of constipation, because they contain mucilage with a laxative effect. Flax seeds contain also mineral salts and vitamins. However, whole flax seeds are not easily digestible, for this reason it is better to grind the seeds in a coffee grinder and then add them to the breakfast yogurt, or to fruit salads or vegetable salads. Just a consideration, flax seeds deteriorate easily, so, once grinded, if not eaten immediately, they should be kept in the fridge in a vacuum container. From flax seeds an oil is obtained. Also this oil can easily deteriorate and for this reason it is better to keep it in the fridge away from light. This oil, that should not be cooked but only used raw on your dishes, contain omega 3 and lignans.