Cat allergies affect an estimated 10-20% of the adult population and are among the most common reasons people give up cats or avoid adopting them. But understanding what causes cat allergies — and what actually helps — can help allergic individuals live successfully with cats.
What Actually Causes Cat Allergies
The common myth is that cat fur itself causes allergies. In reality, the primary allergen is a protein called Fel d 1, which is produced in cat saliva, skin glands, and the sebaceous glands around the anal area. When a cat grooms, the allergen-laden saliva deposits on the fur and skin. The allergen also gets into the air on tiny skin particles (dander) that circulate through the home. Male cats typically produce more Fel d 1 than females, and intact males produce more than neutered males.
Management Strategies
Regular brushing and bathing (when tolerated) reduces the allergen load on the cat. HEPA air purifiers run continuously in bedrooms significantly reduce airborne allergen levels. Vacuuming with HEPA-filter vacuums removes allergens from carpets and furniture. Washing bedding weekly in hot water reduces allergen accumulation. Keeping cats out of bedrooms entirely, and using Allerpet or similar products on the cat's fur, can make a significant difference.
"Hypoallergenic" Breeds
No cat breed is truly hypoallergenic. Some breeds — Siberian, Balinese, Russian Blue, Devon Rex, Cornish Rex, and the hairless Sphynx — produce lower levels of Fel d 1 or shed less, which may produce fewer symptoms in some allergic individuals. But all cats produce Fel d 1, and any cat can trigger allergies in a sensitive person. Spending time with a specific cat before adopting is the only way to know if you will react to that individual animal.