Fats and oils are different in fat consistency but are also an integral part of human nutrition. Today, a significant change in lifestyle is noticeable, which has greatly affected nutritional habits. Lipids are a significant nutrient in human nutrition. Given the origin of foods, there are both vegetable and animal fat and are most commonly found in foods as a mixture of sturated and unsaturated fat. Recommendations have once highlighted the risk of fat loss as well as the need to reduce their input as a result of phobia and the industry is competing in the development of products with reduced fat content, low fat and fat free products to meet the trends diet. Fatigues are not only nutrients of high energy density, but also the source of a whole host of essential micronutrients. Dislipidaemia and an increase in prevalence of obesity and cardiovascular disease have focused solely on fat as the main cause, ignoring the fact that the development of technology and the rise in the standard of living resulted in a total increase in energy intake while reducing physical activity and physical activity in general. Trans fatty acids are unsaturated fatty acids containing trans double bonds. Such "trans" properties appear in industrial processing, a process called hydrogen oil plantation. Their detrimental effect has been proven. They contribute to the development of many diseases, and some also function as carcinogens. Trans fatty acids and hydrogenated oils contribute to the development of the disorder: lack of essential fatty acids, decreased immunity, obesity, diabetes, cholesterol, vascular disease development, and even increased incidence of low- birth weight.