Abstract. In psychology, a state of bodily or mental tension resulting from factors that tend to alter an existent equilibrium. Stress is an unavoidable effect of living and is an especially complex phenomenon in modern technological society. It has been linked to coronary heart disease, psychosomatic disorders,  and various other mental and physical problems. Treatment usually consists of a combination of counseling or psychotherapy and medication. Stress and tension are normal reactions to events that threaten us are used to describe it. Such threats can come from accidents, financial troubles and problems on the job or with family and through our emotional and physical reactions to the given situations, we become what is termed ‘stressed’. Stress is not a diagnosis but a process happening over time. Stress is an unavoidable fact of everyday life and is associated with significant morbidity and even mortality. . In addition to lifestyle considerations – good diet, exercise, meditation, etc.- a number of nutrients and botanicals can provide support for stress-related conditions. Nowadays much attention is paid to the omega fatty acids and their beneficiaries to health. The object of this work is to analyses the effect of omega-3 fatty acids on stress.