According to reports, there are three bad ingredients in pineapple that may cause trouble: 1. Anthraquinones are an organic substance and have a certain irritation to human skin and oral mucosa, but there is no direct harm to health. 2. Serotonin is a nitrogen-containing organic substance that has a strong effect of constricting blood vessels and raising blood pressure, and can cause headaches. 3. Bromelain is a proteolytic enzyme. A few people have an allergic reaction to this enzyme, and abdominal pain, nausea, vomiting, urticaria (commonly known as a rubella block), headache, dizziness and other symptoms occur about 15 to 60 minutes after eating. Severe breathing difficulties and shock can also occur, the so-called pineapple allergy refers to this. Experts advise that after pineapples are peeled, they should be cut into slices or pieces and boiled in boiled water before eating. Bromelain begins to change at temperatures between 45°C and 50°C, and it can be destroyed at more than 90% at 100°C. The anthraquinones can also be destroyed at the same time; serotonin is soluble in water. Lactic Acid,Biodegradable Lactic Acid,Lactic Acid Liquid,Poly Lactic Acid SHANDONG BAISHENG BIOTECHNOLOGY COM , https://www.baishengbioproducts.com