In his subsequent writings, McCollum attacked his rivals at Wisconsin, often by giving a deliberately distorted or false presentation of their achievements. Semba makes it clear that McCollum was not liked by his peers.
There was apparently another, nasty side to McCollum. According to vitamin A researcher Richard A. Semba of the Johns Hopkins University School of Medicine, McCollum left the University of Wisconsin for Johns Hopkins “under a cloud of ethical impropriety and academic misconduct.”
According to Semba, McCollum stole the research notebooks of his colleagues, including Steenbock’s, published their data without their consent or acknowledgement, and purposely sabotaged their animal experiments.
Richard Semba November 7, 2013