(HealthDayNews) -- Are your teens touting the harmlessness of marijuana?
If so, the U.S. Department of Health and Human Services suggests you share this information with them:
- THC -- the active ingredient in marijuana -- affects the part of the brain where memories are formed.
- Marijuana can affect your sense of time and your ability to do things that require coordination, like driving.
- Marijuana affects your lungs -- it contains 400 known chemicals. A single joint contains four times as much cancer-causing tar as a filtered cigarette.
- Marijuana can limit your body's ability to fight off infection.
- Marijuana is not always what it seems. Dealers sometimes lace it with other dangerous substances.
