Three Common Indoor Allergy Myths Busted

dogs, pets, hypoallergenic pets, allergies, myths — Stephanie Rolfe walks her dog Harry near her home in Grove City, Ohio. Rolfe bought a dog that has shorter hair and sheds less than other breeds, thinking it might ease her allergies. However, doctors at The Ohio State University Wexner Medical Center say truly "hypoallergenic" pets don't exist and are one of the most common myths when it comes to allergies.

(Image credit: The Ohio State University Wexner Medical Center.)

Dr. Nabeel Farooqui is an allergist at The Ohio State University Wexner Medical Center. He contributed this article to Live Science's Expert Voices: Op-Ed & Insights.

I often see patients who, because they are allergic to pet dander, thought getting a hypoallergenic pet would be okay. Wrong! These special pets are one of the biggest myths in the allergy world . In short, hypoallergenic pets don't really exist.Most people don't realize that it's not the animal's fur that causes their allergy problems — it's their dander, or tiny flecks of protein found in their skin, saliva and urine. I tell my patients to wash their pets at least once or twice a week and use a HEPA air filter in their bedroom, which should be a pet-free zone.

Another myth is that feather pillows and down comforters cause allergic reactions. This has led to a boom in sales of down alternatives and "anti-allergen" pillows. However, if you test the two types of pillows side by side, this myth is quickly put to rest. As it turns out, you don't need to get rid of your feather bedding. It's more likely that you're allergic to the dust mites in the bedding rather than the feathers themselves.

Allergists at The Ohio State University Wexner Medical Center say side-by-side tests of pillow types show that so-called "anti-allergy" pillows can cause more allergic reactions than feather pillows. It is a widely held belief that feather pillows cause allergic reactions, but studies show that the porous materials used in some synthetic pillows can actually retain more mold and dust mites than feather pillows.

The third myth I'd like to dispel is about the black mold in your basement, bathrooms and showers. You hear stories all the time about toxic, even fatal reactions due to black mold. These reports are often based on weak evidence and haven't been confirmed in studies. It is possible for black mold to cause allergic reactions and irritate your nasal or lung symptoms, but the amount normally found in homes has not been proven to be toxic. If you find some black mold in your house, you can make a cleaning solution with bleach and water to remove it.

Dr. Nabeel Farooqui examines an allergy patient at The Ohio State University Wexner Medical Center. Farooqui says many of his patients buy into common allergy myths that can actually make their symptoms worse. Assuming anti-allergy pillows are healthier than feather pillows is a common misconception, as is the idea of owning "hypoallergenic" pets which, Farooqui says, really don't exist.