title: Reply to E Giovannucci.
mesh_terms: D001943:Breast Neoplasms / Q000453:epidemiology*; D002338:Carotenoids / Q000008:administration & dosage* / Q000097:blood*; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D019207:beta Carotene / Q000008:administration & dosage* / Q000097:blood*
chemical_list: D019207:beta Carotene; D002338:Carotenoids