Abstract: An animal additive for growth stimulation and lowering of feed consumption in accelerated fattening of domestic animals, has as an active agent a complex of inosine and an acid addition salt of dimethyl aminoisopropanol, or a mixture of these compounds. The compound or mixture may be used in the fattening of livestock, such as pigs, poultry, cattle, horses, sheep, dogs, and fish, and other animals. Particularly suitable is the complex of about 1 mole of inosine and about 3 moles of dimethyl aminoisopropanol.4-acetamino benzoate or the mixture of such ingredients in the indicated molar ratio.