- Enzyme deficiency.
- Anatomical defects or structural system of the body. For example, people who have diaphragmatic hernia, upper stomach pain, shortness of breath, reflux, stomach ulcer may find it difficult to eat.
- There are medicinal effects that foods have. For example, if caffeine and coffee cause abdominal pain, this is an unnecessary allergy accusation, which is a type of pharmacological and medicinal reaction caused by caffeine.
For example, someone who does not have lactase enzyme may experience diarrhea by eating milk and dairy products, or the pancreas enzyme may be low and cause problems. Someone may experience jaundice and nausea by eating food that is low in fructose.
It is possible that an enzyme called hydrogenase is low when these people consume alcohol or grapes, and this is when they experience nasal congestion.
The discussion of bitter cocoa, tea leaves causes insomnia and restlessness, which is actually a substance called theobromine that makes a person feel restless.
Another issue is tyramine, which is in fermented foods and soot, especially the cheese made from soybeans, which is called tofu, or if, for example, the combination of cabbage with vinegar, beans, which causes migraines. So, if someone eats cheese or cabbage with vinegar and gets a migraine, the memory of the substance tyramine comes back.
Sometimes the foods that contain histidine, if histidine is converted into histamine as a result of fermentation by bacteria and fungi, cause allergy symptoms, and antihistamine tablets should be taken for this.
Some people leave the fish to stay or bite, or in the drinks when the fermentation is done, they may get headache and hot flashes by eating it, which is due to the histamine that is obtained.
There is another substance called serotonin, which is more abundant in nut products such as American walnuts, green bananas, pineapples, kiwi, tomatoes, dates, and vegetables. In fact, serotonin symptoms such as heart palpitations and hot flashes are found, these people mistakenly mistake it for allergies. They are mistaken, but this is a type of pharmacological effect of serotonin in foods.