Animal oil, represented by lard, contains more saturated fatty acids and cholesterol. Excessive consumption can easily cause high blood pressure, arteriosclerosis, coronary heart disease, hyperlipidemia and cerebrovascular accidents, which is harmful to the human body. However, animal oil has a more fragrant taste and can promote the absorption of fat-soluble vitamins A, D, E, K, etc. In addition, the cholesterol in animal oil is also an important component of human tissue cells and an important raw material for the synthesis of bile and certain hormones.

Vegetable oil contains a large amount of unsaturated fatty acids. After being absorbed by the body, it will stimulate the liver to produce more high-density lipoproteins. This kind of lipoprotein is like a "scavenger" in the blood vessels, constantly removing excess cholesterol attached to the blood vessel walls out of the body to prevent them from "making trouble" in the blood vessels, which is very important for preventing arteriosclerosis, hypertension, cardiovascular and cerebrovascular diseases. Disease is very important.

Many scholars at home and abroad have conducted research on the harmful effects of a partial diet of animal oils or vegetable oils. It is generally believed that those who are partial to animal fats are susceptible to hyperlipidemia, arteriosclerosis, coronary heart disease, cerebrovascular accidents, etc. As for vegetable oils, according to American biochemist Dr. Kenneth Carroll, although the unsaturated fatty acids in vegetable oils are not carcinogens, they contribute to the growth of cancer cells. Animal experiments show that a group that eats unsaturated fatty acids has a much higher rate of colon and breast cancer than a group that eats both animal and vegetable oils. Therefore, from a nutritional and health perspective, it is better to eat a mixture of animal and vegetable oils. Mainly vegetable oil, supplemented by animal oil, the ideal ratio of the two is 2:1.