Mold - Tends to grow in damp or humid areas such as bathrooms, basements and windowsills. When the spores from mold get into the circulating air of your home they can trigger allergy symptoms.
Pet Dander - Can be a major cause of allergies, especially in the winter time when animals are inside more often due to the cold weather. It's not the fur that triggers allergies but a protein found in the saliva, urine and shedding skin cells.
Dust Mites - Not to be confused with bed bugs. Dust Mites flourish in bedding and dust. The droppings and remains from these microscopic creatures cause allergic reactions.
Learn More at Allergena.com about Natural Allergy Relief.