I have to agree with 69ron here, SWIM has been eating 400mg harmala alkaloids and has eaten all the forbidden stuff 2 hours later; ales, blue cheese, sausages and marinated meat all together. SWIM's friends ate the same stuff as SWIM along whith 400mg harmala alkaloids, none exhibited an adverse reaction.
and that is most likely because harmala alkaloids are reversible MAO inhibitors, that is they inhibit the enzyme but they do not do so all the time, so at a given point after harmala ingestion there's always going top be some activity from MAOs.
It is different from pharmaceutical MAOIs which bind strongly to MAOs and the enzymes are then rendered useless until they are turned over by one's body and replaced by fresh batches of MAOs
Still, it is advisable that one gets to know his/her body. That is, I am not suggesting anyone eating 400mg harmaline and go try as much as of the forbidden fruits (like SWIM did!)
Do your own bioassays, this is a place for gathering different opinions and it is finally up to the individuals for deciding the safety margins of their procedures.