The nootropic activity of the complex plant preparation polynoophyt(polynoofyt) has been established in animal experiments. The amino-acid composition of the phytopreparation has been studied. A total of 19 amino acids including seven essential ones was identified. The most significant concentrations were found for aspargic acid, asparagine, glutamic acid, glutamine, proline, cystine, methionine, leucine, gamma-aminobutyric acid, alanine, and arginine.