Cockroaches are some of nature’s most hardy animals and can be found everywhere. Cockroaches are a common allergen that can cause runny noses, itchy or red eyes, skin rashes, coughs, or mucus. People with particular genetic variations are more at risk of having cockroach allergies.

Dust mites are tiny insects invisible to the eye that are commonly found in dusty places and are a common allergen. Symptoms include itchy eyes, a stuffy nose, sneezing, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting. Almost 20 million Americans have a dust mite allergy.

An allergy to eggs is caused by the body’s inability to break down egg protein which causes many problems. Symptoms include rashes, hives, congestion, vomiting, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

An allergy to milk is caused by the body’s inability to process milk or lactose, which causes many problems. Symptoms include bloating, gas, diarrhea, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Mold is a fungus that can typically be found in moist places and is a common allergen. A mold allergy is similar to other allergies, in that its symptoms include swelling, rashes, nausea, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

An allergy to peanuts is caused by the body’s inability to process peanut proteins, which causes many problems. Symptoms vary wildly, including anything from an itchy mouth to severe anaphylaxis. Allergies range in severity, and some can have effects that are more easily triggered, more potent, and/or more long-lasting.

Pet allergies are often triggered by proteins found in a pet’s saliva, urine, or dander. Symptoms include sneezing, runny noses, difficulty breathing, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Birch pollen is one of the largest causes of a pollen allergy and can trigger hay fever. Symptoms include an itchy or swelling mouth, difficulty breathing, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Having a general sensitivity to foods is an important factor that can often result in food allergies, especially when coupled with a weak immune system. Studies have shown that your sensitivity to various foods is primarily determined by your genetics.

A sensitivity to gluten is caused by the body’s inability to process gluten proteins found in grains such as wheat, rye, and barley, which causes many problems. Symptoms include abdominal pain, diarrhea, bloating, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting. This condition is often referred to as non-celiac gluten sensitivity which is different from celiac disease, which is an autoimmune disorder.

Grass pollen is often found in the air during late spring and early summer and is a common allergen. Symptoms include itching, hives, eczema, hay fever, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Hay fever is a set of allergic symptoms common to most allergies. Symptoms of hay fever include congestion, sneezing, eye irritation, and more. Hay fever is often caused by pollen, and severely impacts a sufferer’s mental state.

Histamine intolerance is caused by an excess of histamines in the body. Symptoms include nasal congestion, headaches, cramps, fatigue, and more. Histamine intolerance is caused by a core genetic component, but other factors may affect it, such as hormone changes due to menopause, medications, or the presence of high amounts of histamine in a meal.

Lactose intolerance is caused by the body’s inability to properly process lactose, which is a natural sugar found in milk and dairy products. Symptoms include diarrhea, nausea, abdominal cramps, bloating, gas, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Misophonia is a sensitivity to various sounds. It is a newly recognized condition that is characterized by feelings of rage triggered by irritating sounds, for example people munching, gum chewing, sipping, footsteps, humming. These sounds are referred to as ‘trigger sounds’ within the misophonia community.

Motion sickness is a common condition that occurs when people travel in cars, planes, or boats. It typically presents itself as dizziness, nausea, and/or fatigue. It occurs when the body, the inner ear, and the eyes send conflicting signals to the brain.

Mugwort is a perennial plant common in North America, Europe, and parts of Asia, and are a common allergen. Symptoms are similar to seasonal allergies and include sneezing, coughing, itching, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Noise-induced hearing loss (NIHL) is a temporary or permanent hearing impairment resulting from prolonged exposure to high levels of noise. While typically caused by environmental circumstances, your genetics can play a key role in determining how sensitive you are to getting NIHL.

The ‘stomach flu’ is not actually the flu at all. It is actually a form of viral gastroenteritis and is very contagious. It has symptoms ranging from abdominal pain, vomiting, and diarrhea. Some people have a genetic variation that makes them more resistant to it, protecting them from the most common strains.

Seasonal affective disorder, often called seasonality, is an annual depressive cycle that typically begins and ends at the same time every year. This condition can lead to people feeling depressed and lonely during the winters, as opposed to clinical depression, which is typically year-round.

Benzene is an organic chemical used in manufacturing and is a common irritant. Symptoms of benzene exposure include coughing, wheezing, headaches, dizziness, and more. Some allergies are more severe, and can have effects that are more easily triggered, more potent, and/or more long-lasting.

Mercury is most commonly found in fish and seafood products, as they absorb it from chemical waste found in polluted water. It is naturally toxic to consume, but some are more sensitive to it than others depending on their genetic predispositions.

Polychlorinated biphenyls (PCBs) are a group of odorless, tasteless man-made chemicals. They have the tendency to accumulate inside the human body. While the manufacturing of PCB has been stopped, it is still being released into the environment due to a failure to follow proper safety standards. This means that PCB can be found throughout the environment, including the food we eat and the water we drink. While PCB is harmful to everyone, some are genetically predisposed to be more sensitive to it.