Flaxseed comes from the flax plant, the nutty-tasting seeds can be eaten on its own or crushed and cold-pressed to release flaxseed oil. Main Nutrients Found in Flaxseeds Omega-3 essential fatty acids, “good” fats that have been shown to have heart-healthy effects. Each tablespoon of ground flaxseed contains about 1.8 grams of plant omega-3s. Lignans, which have both plant estrogen and antioxidant qualities. Flaxseed contains 75 to 800 times more lignans than other plant foods and fiber. Flaxseed contains both the soluble and insoluble types. In addition Lignan nutrients in flax have powerful antioxidant and estrogen properties which helps in preventing breast and prostate cancer.