Vitamin A and carotene

Abstract

Vitamin A concentrates from liver oils of rats and pigs which had received diets rich in carotene, as red palm oil, were compared with concentrates from turbot- and sole-liver oils. The initial values of the oils varied widely but those of the concentrates were fairly close, being about 2400 B. U. per mgm. (SbCl3 test). Slow growth was restored in rats by doses of 0.001 mgm. of concentrate.