Does lsd have damaging effects on the developing brain of a teenager?

Probably: No extensive information is available on lsd effects on pubertal (teenage) brains, but what we do know is that it is likely that developing brain tissue is harmed by lsd. Some reports state that it is not permanently harmful, but these reports were based on adult brains.

Yes: Best not to start with this drug. If started get drug counseling.

LSD: Biochemistry. Be careful not to exacerbate an underlying condition in the brain that would provoke more hallucinations even when not taking LSD. LSD can provoke a psychotic episode in a teen who has a vulnerable brain but otherwise may not have become ill.