Harry Steenbock

His first publication reported the results of the single-grain experiment on which he assisted with Hart and Stephen Moulton Babcock.

When McCollum and another assistant Marguerite Davis published their discovery of what came to be called vitamin A, Steenbock thought he deserved more credit than he received.

Steenbock carried on the vitamin A work in Madison, after McCollum accepted an offer from Johns Hopkins University.

[4][5] In 1923, Steenbock demonstrated that irradiation by ultraviolet light increased the vitamin D content of foods and other organic materials.

Instead of quickly selling his rights to a commercial company, Steenbock believed the money should be returned to the university.