What are normal fel d1 levels in cats?

Fel d 1 is a protein produced by cats that is a common allergen for humans. Normal levels of Fel d 1 can vary, but they are typically measured in micrograms per gram of cat hair, with average levels ranging from 0.1 to 2.0 micrograms per gram. Individual cats may produce different amounts, and factors such as breed, age, and sex can influence Fel d 1 levels. Regular grooming and bathing can help reduce the amount of this allergen in the environment.