Some people may have an allergic reaction after eating pineapple. After eating pineapple, symptoms such as abdominal pain, diarrhea, vomiting, headache, dizziness, skin flushing, itching all over the body, numbness of limbs and mouth suddenly appear, and even a series of allergic reactions such as dyspnea and shock appear. People used to call this pineapple allergy "pineapple poisoning" or "pineapple disease".

The main allergic substance causing pineapple disease is "pineapple prion". Salt water can destroy the allergic structure of "bromelain" and make it toxic to individual physique people. Therefore, when eating pineapple, you can peel the pineapple skin first, then cut it and soak it in salt water to reduce the accident of bromelain allergy.

Pineapples are soaked in salt water for two reasons: to make them taste sweeter.

It is best to soak the pineapple for about half an hour, which can not only avoid allergic accidents, but also decompose some organic acids in the salt water to make the pineapple taste sweeter. In addition, pineapple also contains oxalic acid, which will affect the body's absorption of calcium and iron. Soaking with salt will also neutralize its acidity and reduce possible harm to the body.