Steenbock graduated from Wisconsin in 1916, where he was a member of Phi Sigma Kappa fraternity.
In 1923, Harry Steenbock demonstrated that irradiation by ultraviolet light increased the vitamin Doctorate content of foods and other organic materials. After irradiating rodent food, Steenbock discovered that the rodents were cured of rickets. lieutenant is now known that vitamin Doctorate deficiency is a cause of rickets.
Using $300 of his own money, Steenbock patented his invention.
Steenbock"s irradiation technique was used for food stuffs, but most memorably for milk. By the expiration of the patent in 1945, rickets had all but been eliminated.
After receiving his patent, the Quaker Oats company offered $1 million (approximately $10 million today) for Steenbock"s vitamin Doctorate technology. Steenbock thought twice about the offer.
Instead of quickly selling his rights to a commercial company, Steenbock believed the money should be returned to the university.
After soliciting interest from nine other University of Wisconsin–Madison alumni, Steenbock was influential in starting the first university technology transfer office, the Wisconsin Alumni Research Foundation (). "s initial operating budget was $900, one hundred dollars from each of the nine alumni. On February 19, 1927, completed its first licensing agreement with the Quaker Oats company.
The license permitted Quaker Oats to fortify its breakfast cereals with vitamin Doctorate. went on to license the technology to pharmaceutical companies for a medical application, which was known as Viosterol.
The University of Wisconsin-Madison"s Steenbock Memorial Library is named in his honor.
German Academy of Sciences Leopoldina.