Would I be right in saying that Lucid Dreaming is heavily controlled by the amount of DMT produced by the pineal gland?

Assuming such, an LD can only last about an hour at a time (during REM sleep), as after a heavy bout of REM sleep (and if you're able to to control this dream, I'm going to say you had a heavy REM-sleep) you often either sleep really lightly, or wake up all together.
Therefor, theoretically, the point in which you wake up from a lucid dream is also the point at which you exit REM sleep.

Saying this, would substances such as Chacruna, which are known for stimulating the pineal gland, increase the possibility and likely-hood of a Lucid Dream occurring during heavy REM sleep?

Thanks.