Food Allergies - What Happens
The first time you eat a food that triggers an allergic reaction, your body's immune system recognizes the food as a foreign substance (allergen). Your body reacts by developing antibodies against the food. When you eat the offending food again, the antibodies attack the allergen, releasing histamine and other chemicals that cause the symptoms of an allergic reaction.
To learn more, see the Symptoms and Treatment Overview sections of this topic.
Your home is your castle -- except when you’re allergic to it. A recent nationwide survey found that over half of all Americans test positive for at least some allergens, and many of these are indoor allergies such as dust, mold, and pet dander. How can you allergy-proof your home to make it a refuge, not a source of sneezes? Take a tour of your house from room to room, find out where the allergens are lurking, and get relief from indoor allergies.
Read the Relief for Allergies at Home article > >
WebMD Medical Reference from Healthwise

