1. causes indigestion. Once the human body ingests waste oil containing too much arsenic, it will cause indigestion, headache, dizziness, insomnia, fatigue and other symptoms.

2. Gastrointestinal diseases: diarrhea and vomiting. Once a large number of harmful microorganisms such as bacteria in gutter oil enter the intestine, they can cause symptoms such as diarrhea, nausea and vomiting.

3. Lead poisoning. Waste edible oil is easily polluted by heavy metals such as lead in the process of recycling and processing, which may cause toxic liver disease, gastric cancer, renal cancer and so on.

4. Heart disease and cancer. The terrible thing about gutter oil is that after repeated heating and oxidation, the nutrition disappears completely, while the harmful trans fatty acids and saturated fats will continue to increase. Regular use may lead to fatty liver, hypertension, hyperlipidemia and so on. It may even increase the risk of heart disease and various cancers.