Taking 4Life Transfer Factor Lung supports the respiratory system protect and can you from airborne pathogens, pollution and bad air quality. This product is part of the Targeted Transfer Factor^® line, so it also has 4Life Transfer Factor Tri-Factor^® Formula to educate, enhance, and balance your immune system.* The American Lung Association states that up to 60% of Americans live in areas where the air quality can be dangerous to one’s health.¹