In 1923, Harry Steenbock and James Cockwell discovered exposure to ultraviolet light increased the Vitamin D concentration in food. After discovering that irradiated rat food cured the rats of rickets, Steenbock sought a patent. Steenbock then assigned the patent to the newly established Wisconsin Alumni Research Foundation. WARF then licensed the technology to Quaker Oats for use in their breakfast cereals. In addition, WARF licensed the technology for use as a pharmaceutical, Viosterol. WARF's commercialization of Vitamin D culminated in its enrichment of milk.