5HTP heat Decarboxylation make serotonin, just like THC-cooh turn into thc.
Smoking 5htp produce indeed some effects, you have to burn it to get it to work at all.
I learned all of this from
Here + more useful info in the second page of course !
Never tried it with harmalas yet but in little amount it could be a lot more ...Exhaling and dreamy, if you can relate to this

Smoking 5HTP may not be THE Wonderdrug but its a sweet add to my day nevertheless.
I usually start with a nail head worth and keep filling the pipe until im satisfied.