HI Michael, thank you for your valuable feedback. Yes, I investigated melatonin hormone and used it to treat my jetlag when travelling a lot. It was great for jetlag but it did not help me with sleep deprivation. I prefer natural production of melatonin for myself. I wrote an article about the importance of melatonin and how it opposes cortisol hormone. Here is the link in case you might want to review.

https://medium.com/sensible-biohacking-transhumanism/the-critical-role-of-cortisol-in-sleep-disturbances-39f2db3307c8