Methods of treating an adult mammal for an aging-associated impairment are provided. Aspects of the methods include modulating CCR3, e.g., by modulating eotaxin-1/CCR3 interaction, in the mammal in a manner sufficient to treat the mammal for the aging-associated impairment. A variety of aging-associated impairments may be treated by practice of the methods, which impairments include cognitive impairments.