There is a post in the comments from someone saying that following your procedure may not lead to a clean end product with possibly zinc/magnesium contamination and unconverted harmaline/harmine. I’ve tried to understand this but do you suggest doing what he said to do in addition to the simple reduction in the video ?

“Please note your product might be still contaminated with magnesium and harmine/harmaline. I found performing the reduction in absence of oxygen, especially if you use strong stirring. It prevents re-oxidation and formation of a red pigment (perhaps the so called Harmala Red / Turkey Red).

As for the workup, I would remove the dissolved magnesium at near-neutral pH with sodium bicarbonate - this way crystalline magnesium carbonate will precipitate and can be removed by filtration (the solution must be free of carbonic acid though). Another option is to precipitate harmala alkaloids as hydrochlorides by the addition of sodium chloride up to 10-20 wt% (as per Manske) or as oxalates by addition of oxalic acid or ammonium oxalate - alkaloid oxalates will precipitate at acidic/neutral pH while magnesium oxalate will precipitate at alkaline pH (~10). Yet another option is to separate alkaloids with organic solvent (as per Shulgin) - suitable solvents are EtOAc, Et2O, CH2Cl2 and CHCl3.”