Do Ionic Air Purifiers Work? What Research and Regulators Say
Ionic air purifiers, also called ionizers or ion generators, are sold as quiet, filter-free ways to clean the air. They do pull...
All guides
Latest Articles
Every guide on Allergy Playbook, newest first. Looking for something specific? Start with a topic below.
All guides
Newest first · Page 1 of 7
Phthalates and Allergies: What the Research Shows and How to Reduce Exposure
Phthalates are chemicals used to make plastics such as vinyl soft and flexible, and they also show up in some personal care...
Air Purifier Filters: Permanent vs Replaceable, and Which Is Better for Allergies
“Permanent” or washable filters promise no replacement costs, while replaceable HEPA-type filters need new cartridges every so often. For allergies, the deciding...
Is Fermented Soy Less Allergenic? What the Lab Research Shows
Fermentation can break down soy proteins, and lab studies at the University of Illinois found that some fermented soy products reacted much...
Worst Cities for Allergies in 2026: The AAFA Allergy Capitals List
Every year, the Asthma and Allergy Foundation of America (AAFA) ranks the 100 most-populated U.S. metro areas by how challenging they are...
Humidity Control for Allergies: How to Keep Dust Mites and Mold in Check
Dust mites and mold, two of the most common indoor allergy triggers, both depend on moisture. Dust mites absorb water from the...
Mattress and Pillow Covers for Allergies: Do They Work, and How to Use Them
Allergen-proof mattress and pillow covers (also called encasements) do what they promise on one level: they lower the amount of dust mite...
Birch Pollen Allergy and Food: Which Foods Cross-React and What Helps
If you are allergic to birch tree pollen, some raw fruits, vegetables and nuts may make your mouth or throat itch. This...
Dining Out With Food Allergies: How to Order Safely at Restaurants
Eating out with a food allergy takes more planning than eating at home, because you can’t read a label on a restaurant...
Do Seasons Affect Allergies? What Triggers Symptoms Each Season
Yes. Different plants release pollen at different times of year, outdoor mold rises and falls with warmth and moisture, and in winter...
Hair Dye Allergy: Symptoms, the PPD Connection and How to Color Safely
Most allergic reactions to hair dye are caused by one ingredient: paraphenylenediamine, or PPD. The FDA says PPD has been implicated more...
Child Snoring and Allergies: When to Worry and What Helps
Snoring is common in young children, and it’s often linked to allergies and asthma. In an Australian study of nearly 1,000 preschoolers,...
Allergy Drops vs Allergy Shots: How They Compare
Allergy drops and tablets (sublingual immunotherapy, or SLIT) and allergy shots (subcutaneous immunotherapy) both work the same way: regular, gradually controlled doses...