A study of the factors influencing the concentration of complement in the blood

Abstract
A new method for estimating hemolytic complement is described. Young rats tend to have a lower complement than adults. Ingestion of food caused a change in complement in some animals. Irradiation of rats with a Hg vapor lamp may cause rise in complement. A diet deficient in vitamin A in rats tends to lower complement, as compared with that of controls receiving cod-liver oil.