I'm going to use some frozen Natto from the local Asian store. The bacteria are real survivors. I have seen other posts that say this works. If that were not available I would just order a Natto starting kit. The same bacteria are used for many beans. There seem to be different strains but that does not matter to me yet.

Just in how I feel. Dopamine is a excitatory transmitter. That may improve thinking or heart rate. I would look at clarity of thought (assuming everything else is good) and the ability to think things through then watch out for over-thinking or nervousness due to over-thinking.

There is one lab test I do like for this but it is not very simple and only available at one lab. It is the OCT urine test by DBS Labs. The lab involves taking 4500mg of Cysteine / day for 1 week. Folic acid and selenium are added for other reasons. The lab test would have to be taken more than once and dopamine levels compared with secondary factors kept to a minimum. Additionally, it would be necessary to have someone in something they call Phase III to get a good dopamine reading. Phase III can take up to 6 months to 'fill up' on aminos and get the body (or OCT gates) in a known position. This is crazy complicated, I would only do this is someone else paid for it (in a study I guess) -ha At least I believe or would likely be in Phase III already.. moving on...

Truly fascinating. I am happy for all the warnings there. In retrospect it makes me glad there are so many people testing Natto! This is really interesting as bananas are so easy to grow and are therefore inexpensive to buy. This is a great way to remove there sugar too. Obviously I would want to build up my digestion first so that any bad bacteria would reek less havoc on the system. I'll go to that link to discuss it further.