title: Eat more fruits and vegetables to improve your immune system. Five or more portions of fruits and vegetables daily significantly increase antibody response.
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000917:Antibody Formation; D002908:Chronic Disease; D004032:Diet; D005638:Fruit; D006801:Humans; D007107:Immune System; D014675:Vegetables