Robert, Rick,

Thanks for your replies.

Yes dopamine is not levodopa. If it were, we could just eat bananas.

My hunch, and this is what I was hinting at towards the end, is that acidophilus fermentation converts the dopamine into levodopa (i.e. the opposite direction to what we normally are interested in), possibly via tyrosine. I can't find any references for this, however.

I tried banana skin tea, but found it disgusting. So, never gave it a fair test.

The fermented banana actually tastes good.

John