young woman named Donna starts '14 to fill out a life insurance form. She answers all sorts of health questions, including some on diet. One asks how often she eats red meat. Her reply: at least 7 times a week. A visiting nurse takes the completed form and tells her the company will need a blood sample to go along with her application. Donna rolls up her sleeve and watches as the nurse fills several tubes with the crimson liquid. Two weeks later, Donna gets a letter in the mail from the insurer. Her application has been denied. The blood sample revealed that she has inherited a common genetic variation, one that is harmless except to meat lovers. Donna's carnivorous habits have put her at high risk of developing cancer.