"In N1, you can imagine shapes, colors or even bits of dreams in front of your closed eyes, yet still hear stuff in your room"

So is this when DMT https://en.wikipedia.org/wiki/N,N-Dimethyltryptamine starts to rise? It would make sense if it does, but melatonin increases before you get to N1 so I wonder what DMT is like without the melatonin? Maybe that's why there are rumours of some coders microdosing LSD in Silicon Valley, to keep up the creativity, but I cant help but think DMT might be better.

Now if you take some Lecithin before sleep maybe a gram or two, you will dream, but your dreams if you remember them which you probably will, will be based around events before you went to sleep. This then leads further credence to dreams being an indicator to help you process previous days or more historical events. https://en.wikipedia.org/wiki/Lecithin This is what I think is really helping your brain though, choline is used in the connections between neurons and explains baby brain forgetfulness with pregnant women. https://en.wikipedia.org/wiki/Phosphatidylcholine