Whoever got the hype idea of doping cosmetics with callus was one dank daddy. Now, that might jam up your noodle if you're an organic fanboi, but there's no need to get upset about cellular biology mumbo-jumbo if it sounds confusing to you. These sick, perverted, victims of a graduate education in plant science are conducting some interesting research on the production, extraction, and utilization of bioactive compounds from cell culture- avoiding the messy process of growing an entire plant, complete with pathogens and other stuff that contaminates your good medicine. Cell cultures are a great way to produce medicinal plant tissue; you can modulate the production of compounds on a physiological and genetic level; upregulating desirable products and downregulating the rest. Git yer callus on . Here's a link to a review article in the journal Cosmetics that does a great job of describing the advantages and limitations of plant cell culture derived products in cosmetic