Where Do Food Allergies Come From?

by | Oct 5, 2022 | Issue 157, Issues | 0 comments

Have you ever wondered where food allergies come from? Allergies are an immune response to a stimulus that is usually harmless. They result from an overreaction of your body's immune...

Have you ever wondered where food allergies come from? Allergies are an immune response to a stimulus that is usually harmless. They result from an overreaction of your body’s immune system, producing antibodies to fight off the allergen.

A food allergy is an immune reaction to a food protein, which the body mistakes for a harmful substance and produces antibodies to attack it. When a person with a food allergy eats even a tiny amount of the offending food, they may have a severe, sometimes life-threatening reaction.

Most people with food allergies are allergic to more than one food. The most common allergens are milk, eggs, peanuts, tree nuts, soy, wheat, fish and shellfish. 

Many allergies are caused by a cross-reaction to another substance. For example, someone allergic to ragweed may also be allergic to melons. This happens because the proteins in ragweed are similar to the proteins in melons. Therefore, when the body comes into contact with ragweed, it mistakenly identifies the protein as a threat and produces an immune response.

Unfortunately, there is no cure for food allergies, and avoiding the offending foods is the only way to prevent allergic reactions. This avoidance can be challenging as people with severe allergies must be constantly vigilant about what they eat. Even trace amounts of the allergen can trigger a reaction!


Food Allergy Origins

There is no one definitive answer to the question of where food allergies come from. But the scientific field has developed several theories about what may contribute to the development of food allergies.

The first theory states that genetics and environmental factors cause allergies. Therefore, some people may be more likely to develop allergies because of their genes, but they may only develop symptoms if exposed to specific allergens.

The second theory states that allergies are caused by changes in the gut microbiome, the community of bacteria living in the gut, and it’s thought that allergies may develop when the balance of bacteria in the microbiome is disrupted. This theory is supported by the fact that allergies are more common in industrialized countries, where the microbiome is often less diverse.

Finally, it’s also possible that allergies are simply a result of repeated exposure to an allergen. When someone is repeatedly exposed to an allergen, they may become more sensitive to it and eventually develop an allergy.


Increase in Food Allergies

Food allergies have become more prevalent in recent years. One theory suggests that the increase in food allergies may be due to the ‘hygiene hypothesis.’ This theory posits that we are too clean, and our immune systems are not being challenged enough. In the past, people were exposed to more bacteria and other microorganisms, which helped build up their immunity. Nowadays, we live in a much cleaner environment, and our immune systems may not be as strong as they once were.

Another theory blames the overuse of antibiotics for the increase in food allergies. Antibiotics kill both good and bad bacteria in the gut. Some researchers believe that this can disrupt the balance of gut bacteria and lead to allergies.

Still, other experts believe that food allergies are simply due to genetic changes. Allergies tend to run in families, so certain genes may make people more susceptible to developing allergies.


A Parting Reminder

Whatever the reason for the increase in food allergies, it’s clear that they are a serious problem for many people. With no cure available, avoidance is the only way to prevent reactions. This can be difficult and require a lot of vigilance, but it is the best way to keep allergies under control.

Peter C

Peter C