I just want to say LSD isn't harmful at all. It doesn't make your brain bleed, it doesn't kill your brain cells. It's just a drug. Taking too much of it could destroy your sanity, but as someone who has taken it before (and I stopped taking it after a bad trip) it's probably the more healthy options in drugs. Now I'm not saying do it. Actually DONT. If you don't have the mental capacity, you won't be able to take it. You'll have a bad trip and you'll think really bad thoughts. as far as lethality goes, LSD and weed are the same in that 0 deaths have been caused by simply taking them.