I'm conducting a long series of experiments (one per night), using myself as the test subject, with so far over 250 individual experiments. The variables are amounts of various herbs and supplements ingested before, or during, the night. And I quantify the outcome in terms of lucidity attained, etc. The experiments have been carefully documented.

However, I have not yet turned the raw data into a data set ready for modelling (which is my goal), so I can't say much specifically about what works, and how. But there are some rather clear patterns emerging, and one of these is that the combination of B6 and L-tyrosine is very strongly correlated with attaining lucidity (for me, that is), if taken at WBTB time. I have not got a clear feeling about the level of control obtained in these lucid dreams, so I have to abstain from speculating about that. Eventually, I will have a proper statistical model ready, at which point I can say a lot more.

In my experiments, the dose of B6 is 121 mg, and the dose of L-tyrosine is 500 mg.

There are quite a few things, that are said to increase dopamine levels. For example Omega-3, Ashwagandha, St. John's Wort, Vitamins B6, B9, and B12. And - most prominently - L-tyrosine and Mucuna Pruriens.

My experience with Mucuna is very limited, and so far not at all positive. This may, of course, be due to a poor quality brand, rather than to Mucuna itself.

B6, on its own, certainly has a beneficial effect on dreams (for me), as it increases dream recall pretty dramatically.