Is it true that dark chocolate (specially in high cacao to sugar ratios, like 85%) can act as a MAOI?

I've tripped around six or seven times, usually by lemon tekking, but my longest trip was DEFINITIVELY the one in which I made a dark chocolate bar. It lasted like 9 whole hours lol

I read recently that cocoa and dark chocolate can act as a MAOI. Is this true? If so, what are its effects?