It makes a bit more sense when you look at the rest of their behavior. People who take drugs (especially psychedelics) tend to look down on people who don't as being prudes, unenlightened, or just ignorant. When you look at it that way, drug-users and health nuts have something in common; they like to use their way of life to feel superior to other people.
(oh, and make sure to only give 5-htp after the high wears off. Otherwise, you increase the risk of serotonin syndrome.)
Since it turns out that it isn't feasible to include check as many as apply questions in the big survey, I'm asking about supplements here. I've got a bunch of questions, and I don't mind at all if you just answer some of them.
What supplements do you take? At what dosages? Are there other considerations, like with/without food or time of day?
Are there supplements you've stopped using?
How did you decide to take the supplements you're using? How do you decide whether to continue taking them?
Do you have preferred suppliers? How did you choose them?