 Kremer was particularly interested in the effects of starvation on the human body, especially on the liver, and because Kremer was responsible for examining the prisoners that sought admission to the camp infirmary, he was able to personally select the prisoners that he believed would make good test subjects for his experiments.He often performed autopsies in order to extract samples from the liver, spleen and pancreas.On several occasions in his diary, he mentions the extraction of organs and tissues (which he called "living-fresh material") from living victims, such as on October 15, 1942, when he writes, "Living-fresh material of liver, spleen and pancreas taken from an abnormal individual."