“…Beres et al (1957) noted good correlation between labelled triolein and vitamin A results, as did Fierst, Feldman, Solomon, and Langsam (1958) and Fitzgerald, Fennelly, and Hingerty (1962). These reports are not confirmed by the present study, because too many patients with normal fat excretion and normal blood radioactivity show abnormal results after vitamin A loads, while a significant proportion of patients with steatorrhoea and flat vitamin A curves produce normal levels of blood radioactivity.…”