It can feel like everyone is drinking under the age of 21 in high school and college. According to last year's National Survey on Drug Use and Health, 7.7 million Americans between age 12 and 20 said they consumed alcohol. By age 20 over half of Americans have participated in underage drinking. Parents and teens should know that although there might be some intense peer pressure to drink, the real-world consequences for getting caught underage drinking are serious. Even one mistake can lead to consequences that spread through personal life, school and work.