Flesh Feast (1970)

Dr. Elaine Frederick has just perfected a way of using maggots to make her test subjects not only look younger, but actually become younger. When they hear of the results of her experiments, her first clients, a team of hispanic neo-nazis, are delighted with the news. It seems they have a very elderly VIP in their group who needs to be rejuvenated before he can begin rebuilding his thousand-year reich. As their plan moves toward its completion, Dr. Frederick's habit of experimenting on stolen corpses begins to attract the attention of an investigative reporter.