Interesting post. I can definitely identify with the journey of exercise, supplementation, and spiritual exploration.
I would like to caution you that your connection between the calming effects of vasodialation and enlightenment might be a bit superficial. It seems you have discovered what it is like to be calm, or have equanimity. While being calm is both a prerequisite and downstream effect of enlightenment, it is not to be confused with the deep knowledge of truth (enlightenment). Enlightenment is a deep subconscious insight, that becomes more likely to happen when the mind is calm, clear, and alert.
Enlightenment is also not state dependent. It's often thought of as something you realize and don't forget. It also induces perceptual changes, like those described by Jeffrey Martin. Entering states where your mind is finding profound connections is not enlightenment, but it is a step closer to realizing that insight.
I'm posting this not to tear down your experience, but to urge you on. I'm suggesting that you may think you've sailed the seven seas, where in reality you only saw a picture of a boat. Thinking you've found enlightenment and that it's not great is likely to steer you away from this path, which in my opinion, would be unfortunate.
And how can I be so sure that you didn't find enlightenment? Those who find it don't discredit it. ;)
This is the happiness we are really searching for. The other kind is better described as pleasure.