Abstract: Disclosed are apparatus, systems, and methods for processing a plant-based extract to remove harmful chemicals or metals. In one embodiment, a method can include exposing the plant-based extract to an acid and basic solution, centrifuging a mixture comprising the plant-based extract and the treatment solution to yield a mixture supernatant, dissolving the mixture supernatant in a solvent to yield a solvent-extract mixture, passing the solvent-extract mixture in liquid or vapor form through a packed column to yield a solvent-extract effluent, and centrifuging at greater than a RCF of 6000 the liquid effluent to yield a processed plant-based extract.