[Effect of diets with different caloric levels on blood protein turnover]

The content of albumin, fibrinogen, the summary fraction of IgG + transferrin and summary serum proteins in the blood plasma, their turnover constant and half-life were investigated in 122 Wistar male rats that during a month received rations with reduced calorific value at the expense of carbohydrates or due to gradual diminution of protein, fat and carbohydrates in the ration. It has been shown that the permissible level of the ration calorific value reduction depends not only on the energy deficiency level, but also on the ration components at the expense of which the reduction is achieved. The reduction of the animals' nutrition calorific value influences the general development of growing rats and the blood protein turnover rate, the specific action on the mechanisms of the blood protein half-life regulation being of a greater importance than the energy deficiency.