He simply wants to be able to legally drink.
Steven D. Arnold

You’re actually correct on the mental health part. Under the age of 21, the brain is still undergoing development, which alcohol can hinder.




The first study has several references that have additional information. The general consensus is that yes, alcohol has a negative effect on the developing adolescent brain, and can impair the ability to form new memories. Alcohol can also rewire how the brain works, which could have a positive or negative outcome.