5-HTP is just another supplement pill. It creates seratonin which blocks REM sleep during the early stages causing REM rebound in the morning. Basically the same as melatonin or B6 does.But its supposed to be much more effective.

Had another Lucid within a non lucid-dream this morning.
I woke up back in the original dream, but this time was suspicious.
I did a finger reality check and it worked! The first time ever I've used an RC
before knowing I was dreaming!