There are some new developed teks for extracting dmt with food-safe materials and/or no petro-chemical solvents, such as BLAB , Amor Fati's approach, or Q21Q21's extraction tek. The biggest advantage is, as said, the use of relatively non-toxic material and no petrochemicals but instead solvents such as limonene, which is basically pure orange oil. The disadvantage is that to retrieve the dmt from limonene, you cannot evaporate it (as limonene doesnt evaporate cleanly, it leaves gooey residues), and freeze precipitation also doesnt work (as even in freeze temperatures, dmt is still too soluble in it so it doesnt precipitate), so there are 2 extra steps, which are to 'salt out' the limonene by mixing it with an acidic solution, evaporating that solution and then freebasing the resulting product if one wants to smoke it (or just keeping the salt for storage or oral consumption), as explained in the teks mentioned above. These steps are just as easy as any other step done in the earlier steps of the extraction but the fact that its two extra steps means some extra time and work which some people might not want.