It seems like caffeine alone is an MAOI [1] and that decaf may not have the same effect [2] - very cool, thank you for sharing! I know there's a lot more in coffee too, so I'm looking forward to learning more.

[edit] Found this [3] which I assume is what you were talking about? Which I assume is the reason studies show it can act as an antidepressant [4]. Fascinating!

[1] https://pubmed.ncbi.nlm.nih.gov/23850513/

[2] https://www.jwatch.org/fw108796/2014/05/06/severe-hypertensi...

[3] https://pubmed.ncbi.nlm.nih.gov/16139309/

[4] https://www.medicalnewstoday.com/articles/313988#possible-ri...