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aTacoParty t1_j23yo3w wrote

It's very rare but possible. The majority of peripheral dopamine comes from peripheral sympathetic nerves which in part use dopamine to communicate. Some of this dopamine is taken up in the blood stream. Interestingly, there's almost as much dopamine in your blood as adrenaline though what it's doing there is not really known.

https://academic.oup.com/endo/article/151/12/5570/2456083?login=true

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3373991/

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