The purpose of the researches was receiving experimental data on biochemical indicators of blood of young growth of Hereford breed in the conditions of Yakutia. The pilot study is conducted in CAC "Churapcha" of Churapchinsky ulus of the Republic of Sakha (Yakutia) in the group of bull-calves and heifers at the age of 6.9 months up to 10 heads in each. The groups were created de-pending on sex. The animals were grown up on the technology of beef cattle breeding, in identical con-ditions of feeding and keeping. The diets on nutri-tional value of forages, power level and the content of the main nutrients were within the demanded ARIAH norm. During summer period animals were kept on natural pastures. Experimental biochemical indexes of aluminous, mineral and vitamin ex-change of young growth of Hereford breed in the conditions of Yakutia were received. On phospho-rus scope of fluctuations they made in heifers - 4.12±0.09 - 4.26±0.21 mmol/l; in bull-calves - 4.38±0.01 - 4.49±0.06 mmol/l. Recognizing that the synthesis mechanism of calcium and phospho-rus in the organism are identical, it follows that in this situation there were no calcium-phosphorus relation transgressions. It is known that zinc in an organism plays a role of activator of a set of en-zymes for a metabolism of nucleinic acids, protein, carbohydrates. Zinc level is in serum of blood at the upper bound of physiological norm: 169.5±0.50 - 172.5±0.60 mg/% in heifers, 170.9±1.43 - 174.6±0.08 mg/% in bull-calves (at the norm of 110-170 mg/%). Proceeding from the main func-tions of zinc for an organism, it is possible to speak about high-quality mobilization of nutrients from forage in the forms, suitable to the organism. Quan-titative and high-quality changes of composition of blood serum (the general protein, phosphorus, zinc, iron, leucine and vitamin A) serve as indicators of reactivity of an organism at its interaction with envi-ronment and testify to the best adaptive qualities and adaptive opportunities of an organism.