Shortening contains a high level of trans fatty acids, the hazards and side effects of which are mainly caused by trans fatty acids. It is mainly reflected in the triggering of obesity, leading to abnormal lipid metabolism, affecting fertility, as well as affecting the health of infants and fetuses, and increasing the risk of the onset of Alzheimer’s disease. 1. Increase the risk of obesity: shortening itself is more difficult to digest, easy to hoard in the body after a large number of use, leading to centripetal obesity, increasing the risk of obesity. 2. Lead to lipid metabolism disorders: trans fatty acids in shortening can increase the low-density lipoprotein content in the blood and reduce the high-density lipoprotein content, thus increasing the risk of abnormal lipid metabolism diseases, which is not conducive to the health of the cardiovascular and cerebral vascular system. 3. Impact on fertility: trans fatty acids in shortening can affect the quality of male spermatozoa, leading to decreased fertility. 4. Affect the health of infants and fetuses: trans fatty acids in shortening can affect the absorption of essential fatty acids, such as linoleic acid and linolenic acid, by children, especially fetuses, thus affecting the development of the nervous system, retina and other important organs. 5. Increase the risk of Alzheimer’s disease: a large number of studies have shown that trans fatty acids in shortening increase the risk of Alzheimer’s disease. Therefore, in order to be healthy, you should avoid or reduce the intake of food containing shortening, such as some bread, cake and French fries and other processed foods.