1. Lard residue contains a lot of animal fat, and its fat belongs to saturated fat, that is, stearin. Eating less is ok, but eating more is harmful to health, because it can not only cause obesity, but also increase cholesterol, resulting in arteriosclerosis, hypertension and cardiovascular and cerebrovascular diseases. Therefore, normal people can take a small amount, but obese people, the elderly, or people with cardiovascular and cerebrovascular diseases are not suitable for taking it.

2. All organic compounds with carbon content (oil residue is a substance with high carbon content) will cause a carcinogen called "benzopyrene" if they cannot be fully ignited (air oxidation). Organic chemicals are decomposed, cyclized and polymerized to produce 3,4-phenylpyrene. There is a high content of 3,4-benzopyrene in oil residue, and the longer the frying time, the higher the content. The rice coke immediately burned in the bottom pot also contains 3,4-benzopyrene. 3, 4 Benzene pyrene is a benzene series compound, a carcinogen, and an organic chemical compound with four or more benzene rings. Benzene series are the most widespread and total carcinogens in the natural environment. Among more than 1, kinds of carcinogens, benzene series account for more than 1/3. Therefore, don't eat more ingredients such as lard residue, otherwise, it will inevitably increase the intake of 3,4-benzopyrene, that is, increase the prevalence of esophageal cancer and gastric cancer.

3. Pork tenderloin takes a long time to cook animal oil, and the oil temperature is very high. When the oil temperature reaches above 2℃, it will cause a lot of peroxides and other carcinogens; The burnt oil residue will continue to cause carcinogens such as nicotine and dimethyl nitrous acid.

4. Long-term vegetable oil residue can cause gastric cancer. Because the oil residue is not easy to digest and absorb in the stomach, it will stay in the stomach for a long time, which will promote the metabolism of gastric acid (gastric juice) and cause long-term irritation to the gastric mucosa. In the long run, it will cause gastric mucosal erosion and ulcer, and the resistance will be weakened. Coupled with the stimulating effect of carcinogens on the digestive system mucosa, it will increase the probability of esophageal cancer and gastric cancer.

5. Action: nourishing yin and blood, moistening lung and removing toxin. There are various kinds of oleic acid in the oil residue, and the components of saturated fat and unsaturated fat are very high, which can show very high calorific value, and the vitamin D and vitamin E are also very colorful, smelling the aroma of animal oil.