Some types of foods often generate reactions in people who consume them. For example, the very hot nasal discharge; beans and other legumes, gases; or alcohol, even moderate, can be a cause of headache. At other times, the reactions are due to the intolerance of the organism to certain components present in the food. This happens, for example, with the lactose found in dairy products.
Sometimes intolerances are confused with food allergies. But the reality is that they are very different cases, because in these the immune system participates. When an allergic product is ingested, this system triggers an abnormal immune response: it releases chemicals, such as histamine, to protect against proteins that it mistakenly considers harmful.
Allergies cause several mild symptoms such as rashes or itchy eyes. However, in some circumstances, the consequences can be very serious, since in the most extreme cases it causes an episode of anaphylaxis and even death.