State laws that prohibit people under the age of 21 from purchasing or possessing alcohol, and from driving with any alcohol in their system save 732 lives a year in the United States, according to a study released today that has examined 23 years of research on the subject. The study further shows that if every state adopted 'use and lose' laws—suspending the license of anyone under 21 cited for possession, consumption or attempt to purchase alcohol—an additional 165 lives would be saved.