By biological value, flax seed oil is the first among other edible vegetable oils and contains a lot of substances useful for the body (polyunsaturated acids, vitamins F, A, E, B, K, saturated fatty acids (10% composition). Flax seed oil is an excellent external source of valuable polyunsaturated fatty acids Omega-3 and Omega-6 (our body cannot synthesize these fats on its own.) Moreover, if Omega-6 is also present in soybean, sunflower, mustard, rapeseed and olive oil, then Omega-3 contained in q only in flaxseed oil. When they enter the body, Omega-3 and Omega-6 are introduced into the cell structure, and subsequently positively affect cellular activity and the rate of transmission of nerve impulses. Regular use of flaxseed oil in the diet helps lower cholesterol and blood viscosity, increase vascular elasticity, which ultimately prevents the development of myocardial infarction, atherosclerosis, hypertension, coronary heart disease, reduces the risk of stroke and blood clots. In addition, flax seed oil normalizes the functioning of the entire human digestive system: improves liver function, helps treat colitis, gastritis, eliminates constipation, heartburn, and has an antiparasitic effect. The immunoprotective properties of the oil are invaluable: its use as a food product prophylactically prevents some oncological diseases (breast cancer and colon cancer). Also in medicine, it is recommended that flax seed oil be taken by postoperative and debilitated patients during the rehabilitation period. Regular use of flaxseed oil is recommended for children for the full, healthy development of the body. The role of flax seed oil as a useful health product in the life of any woman is very important. This oil must be included in the diet of pregnant women, because its components positively affect the proper development of the brain of the unborn child, facilitate the course of pregnancy and childbirth. Daily use of flaxseed oil normalizes hormonal levels, mitigating premenstrual syndrome and improving a woman's well-being in menopause. Flaxseed oil is also widely used in the complex treatment and prevention of diseases of the lungs and bronchi, diseases of the nervous system, diseases of the kidneys and bladder, diseases of the thyroid gland, and in the treatment of potency disorders in men. In modern cosmetology, flax oil is used in all kinds of masks for skin and hair due to its high content of vitamins and anti-aging, emollient, bactericidal properties.