Saline water can reduce allergic reactions. Pineapple contains a small amount of protease, which is a little irritating and can cause allergies in many people. In mild cases, it will irritate the oral mucosa and the tender epidermis of the lips, causing an allergic reaction of red and swollen lips. In severe cases, diarrhea, vomiting or Headache and other symptoms, and the role of salt water is to destroy this protease and make it inactive, which can reduce possible allergic reactions. People with common sense will soak it in salt water before eating. The first is because pineapple contains bromelain. This enzyme has a great stimulating effect on the oral cavity. Some people will develop allergies, dizziness and brain swelling after eating it. Soak it in salt water before eating to reduce the irritation of pineapple enzyme on your mouth.

Soaking in salt water can inhibit the stimulation of the oral cavity by bromelain to a certain extent. However, as saliva increases and the salinity decreases, the protease activity resumes. Although this problem cannot be solved in essence, some pineapples have strong sourness and astringency. Soaking pineapples in salt water can make the pineapples sweeter and taste better. To avoid allergies, there is an enzyme in pineapple that may cause allergic reactions if eaten directly, and may also irritate the oral mucosa and the tender epidermis of the lips. Edible salt can destroy this enzyme, but if the soaking time is not enough, the enzyme in the pineapple has not completely lost its activity and may still cause allergies. It is recommended to soak for about thirty minutes at the end.

Pineapple, like some fruits, can make some people allergic to it. The allergic reaction can occur as quickly as 15 minutes. Such symptoms are called "pineapple disease" or "pineapple poisoning". For example, abdominal pain, diarrhea, vomiting, headache, dizziness, skin flushing, itching all over the body, numbness of limbs and mouth and tongue. In severe cases of allergies, reactions such as difficulty breathing and shock may occur.

When eating pineapple, you must soak it in salt water. This is because there is an enzyme in pineapple. If you eat it directly, you may have allergic reactions, such as diarrhea, vomiting or headache, and may also cause damage to the oral mucosa. Or the epidermis of the lips may cause some irritation. Salt water can destroy the structure of this enzyme, but if the soaking time is not enough and the activity is not completely lost, it may still cause allergies.