Recent research tells us that how youth and young adults perceive harm from drugs and alcohol is often wrong. SAMHSA’s National Survey on Drug Use and Health (NSDUH) from 2020 shows that 57 percent of youth ages 12 to 17 did not think there was great harm in having five or more drinks once or twice a week. Even more concerning is that as many as 62.6 percent of those in that age group did not think it was very harmful to smoke marijuana once or twice a week.