I certainly think taking ayahuasca or dmt could help but its not a cure all and try to avoid creating un-realistic expectations. Other then that though I am sure some kind of emotional and psychological benefits are possible and why not give it a try. But yes its important not to use drugs to try to substitute other drug experiences so I think its a good idea to have a little sober time and just think things over for a bit.

Doesn't matter if you eat seretonin it doesn't cross the blood brain barrier, but eating precursors might help replenish the supply. But maintaining a good healthy balanced and diverse diet is key in any psychological issue, at least I think so.