Small amounts of shortening generally have no side effects, but if consumed in large quantities over a long period of time it may cause obesity and increase the incidence of cardiovascular disease. Shortening should not be consumed directly, but used to process pastries, bread or fried foods. Appropriate consumption of pastries, breads or fried foods processed with shortening usually does not bring side effects to oneself. However, it should be noted that these foods are high in calories and if eaten in large quantities over a long period of time, they can lead to an increase in the amount of fat in the body, thus causing obesity. Shortening contains a large amount of trans fatty acids (the safe intake of trans fatty acids is less than 2 grams per day), which are not easily digested and absorbed by the human body, and excessive intake will lead to the accumulation of trans fatty acids in the body’s blood vessels, which will increase the chances of thrombosis, atherosclerosis and other cardiovascular and cerebrovascular diseases. It is recommended to develop good dietary habits, eat more light and easy to digest food, eat less high-fat, greasy stimulating diet, reduce the intake of trans fatty acids.