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Dr. Dextrose is a Candy Person who first appears as a speaker at Princess Bubblegum's science barbecue in "The Real You." He gives a speech on the future of cuteness. When super-smart Finn calls his ideas quaint, Dr. Dextrose gets mad and flashes an evil look at him while muttering to himself.
Dr. Dextrose resembles a marshmallow wearing a suit and has rouge hair. Like most doctors in Ooo, he has a Scientific Parasite living in his coat pocket, which is a little creature that feeds on "smart brain waves."
- Dr. Dextrose is named after dextrose, a form of the simple sugar glucose. It is one of the primary sugars in marshmallows, hence his name.