RESUMEN
Fattened pigs (from 20 to 100 kg of body weight) given Ridzol P (6 g per 100 kg of mixture) were found to grow more quickly (by 8.1%) and to convert the feed mixtures more efficiently (A 1 by 6.6%, SOL by 3.9%). Twenty indicators of the metabolism were determined in serum, plasma, liver, and supra-renal gland after 110 days of Ridzol P administration. The changes in the concentrations of the total protein and urea suggest that the stimulative action of Ridzol P is based on better conversion of feed protein. The levels of vitamin A and E were increased in the blood plasma of the tested group. The content of vitamin A in the liver was significantly higher. The dry weight of the muscular and liver tissue of the tested animals was lower; the content of nitrogen compounds increased and the content of fat decreased in the muscular tissue of these animals.