The efficacy of Omega-3 PUFA in cardiology is so high that Omega-3 PUFA drugs are added to treatment protocols for patients with cardiovascular diseases in many countries. This group of drugs slows down the processes of oxidative stress and chronic inflammation, thereby making a sizable contribution to the complex treatment of cardiovascular diseases. In addition, Omega-3 PUFA slow down the process of aging and prevent the development of age-related diseases, affecting the rate of telomere shortening.