A specific lactate-reducing effect of fatty vegetable oils (sea-buckthorn and rose), of the sperm oil and the "Spedian-2M" preparation, of a permanent nature, or sporadically, in tests on rats, and markedly, as well as persistently--in experiments with guinea pigs was revealed. The phenomenon was most distinctly pronounced in the liver. The oils also produce a glycogen-mobilizing effect, since there could be noted a relative stability in the content of glucose in the tissues, and this despite an increased carbohydrate decomposition. The study oils, even in elevated doses, are not toxic, do not intensify the oxidative metabolism of carbohydrates, thus creating all the necessary conditions for stimulation and proteinic synthesis.