Oh, so like these bitchin' sunglasses I found the other day?

That's the concept behind the researchers who are sending folks into DMT trips with complex math problems, trying to see if the entities people encounter will return a correct answer, thus establishing first contact.

Pikmin truthers rejoice

Hospital report that people eating it say the same thing. No known psychedelic compound has been found.

It could be anything. They report this happens with undercooked mushrooms, might as well be a protein.

Now, finding what it is that causes the effect will be very difficult...

You'd have to isolate all compounds in there which are not been previously tested and test them separately. Even then you may find nothing as the effect may be produced by a specific combination of compounds which have no activity when isolated.

Basically: we know it happens but have no idea why.

Can't let an ounce of whimsy go uncrushed, can you?