Pineapple contains a substance called bromelain, which is an allergic substance. If eaten directly, it will cause allergic reaction, also known as pineapple disease. Symptoms include diarrhea, abdominal pain, vomiting, dizziness, numbness in the mouth and tongue, and itching all over the body. In severe cases, a series of allergic reactions such as dyspnea and shock may occur.

After pineapple is soaked in salt water, it can effectively destroy the structure of "pineapple prion" and make it lose its sensitization ability to human body. Soak pineapple in salt water before eating, and decompose some organic acids in salt water to remove sour taste and make pineapple taste sweeter.

Therefore, before eating pineapple, you can cut it into pieces and soak it in salt water for a while, so you don't have to worry about bromelain allergy and the taste will be better.

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If you want to keep the fresh taste of pineapple, you can soak it in salt water for about 30 minutes first, and then soak it in cold water to remove the salty taste, which can also achieve the purpose of desensitization and make pineapple sweeter. However, people with allergies should be careful to eat, and people with a history of eating pineapple allergies should be banned from eating.

Finally, if the top of the pineapple is full and the peel turns yellow, it means that it has reached nine maturity. This pineapple juice is rich, with high sugar content and strong fragrance. If you don't eat it right away, you'd better choose a fruit that is still hard, light yellow with green luster and about 70% to 80% mature.

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